19953551706228 has 384 divisors, whose sum is σ = 61040201564160. Its totient is φ = 5518934507520.

The previous prime is 19953551706173. The next prime is 19953551706247. The reversal of 19953551706228 is 82260715535991.

19953551706228 is a `hidden beast` number, since 1 + 9 + 9 + 5 + 3 + 551 + 70 + 6 + 2 + 2 + 8 = 666.

It is a super-2 number, since 2×19953551706228² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1520727508 + ... + 1520740628.

It is an arithmetic number, because the mean of its divisors is an integer number (158958858240).

Almost surely, 2^{19953551706228} is an apocalyptic number.

19953551706228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19953551706228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30520100782080).

19953551706228 is an abundant number, since it is smaller than the sum of its proper divisors (41086649857932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19953551706228 is a wasteful number, since it uses less digits than its factorization.

19953551706228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13652 (or 13644 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 63.

The spelling of 19953551706228 in words is "nineteen trillion, nine hundred fifty-three billion, five hundred fifty-one million, seven hundred six thousand, two hundred twenty-eight".