20621233104560 has 40 divisors (see below), whose sum is σ = 52302945785616. Its totient is φ = 7498630219520.

The previous prime is 20621233104547. The next prime is 20621233104587. The reversal of 20621233104560 is 6540133212602.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 20621233104560.

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, 11716608839 + ... + 11716610598.

Almost surely, 2^{20621233104560} is an apocalyptic number.

20621233104560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20621233104560 is an abundant number, since it is smaller than the sum of its proper divisors (31681712681056).

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

20621233104560 is a wasteful number, since it uses less digits than its factorization.

20621233104560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23433219461 (or 23433219455 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 20621233104560 in words is "twenty trillion, six hundred twenty-one billion, two hundred thirty-three million, one hundred four thousand, five hundred sixty".