20902255400960 has 96 divisors (see below), whose sum is σ = 50160185122320. Its totient is φ = 8359731953664.

The previous prime is 20902255400953. The next prime is 20902255401037. The reversal of 20902255400960 is 6900455220902.

It is a super-2 number, since 2×20902255400960² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74950739 + ... + 75229101.

Almost surely, 2^{20902255400960} is an apocalyptic number.

20902255400960 is a gapful number since it is divisible by the number (20) 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 20902255400960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25080092561160).

20902255400960 is an abundant number, since it is smaller than the sum of its proper divisors (29257929721360).

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

20902255400960 is an equidigital number, since it uses as much as digits as its factorization.

20902255400960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285723 (or 285703 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 20902255400960 in words is "twenty trillion, nine hundred two billion, two hundred fifty-five million, four hundred thousand, nine hundred sixty".