19673253972 has 144 divisors (see below), whose sum is σ = 53181448320. Its totient is φ = 6288855552.

The previous prime is 19673253911. The next prime is 19673253973. The reversal of 19673253972 is 27935237691.

19673253972 is a `hidden beast` number, since 1 + 9 + 6 + 7 + 32 + 539 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19673253973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15167628 + ... + 15168924.

Almost surely, 2^19673253972 is an apocalyptic number.

19673253972 is a gapful number since it is divisible by the number (12) 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 19673253972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26590724160).

19673253972 is an abundant number, since it is smaller than the sum of its proper divisors (33508194348).

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

19673253972 is a wasteful number, since it uses less digits than its factorization.

19673253972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1498 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The spelling of 19673253972 in words is "nineteen billion, six hundred seventy-three million, two hundred fifty-three thousand, nine hundred seventy-two".