20854648169652 has 144 divisors (see below), whose sum is σ = 54109560612800. Its totient is φ = 6246283507200.

The previous prime is 20854648169647. The next prime is 20854648169671. The reversal of 20854648169652 is 25696184645802.

It is a super-2 number, since 2×20854648169652² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64570527 + ... + 64892697.

Almost surely, 2^{20854648169652} is an apocalyptic number.

20854648169652 is a gapful number since it is divisible by the number (22) 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 20854648169652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27054780306400).

20854648169652 is an abundant number, since it is smaller than the sum of its proper divisors (33254912443148).

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

20854648169652 is a wasteful number, since it uses less digits than its factorization.

20854648169652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322718 (or 322705 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 66.

The spelling of 20854648169652 in words is "twenty trillion, eight hundred fifty-four billion, six hundred forty-eight million, one hundred sixty-nine thousand, six hundred fifty-two".