20689800874624 has 256 divisors, whose sum is σ = 51855484608000. Its totient is φ = 8187988623360.

The previous prime is 20689800874579. The next prime is 20689800874627. The reversal of 20689800874624 is 42647800898602.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (20689800874627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39295989 + ... + 39819019.

It is an arithmetic number, because the mean of its divisors is an integer number (202560486750).

Almost surely, 2^{20689800874624} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20689800874624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25927742304000).

20689800874624 is an abundant number, since it is smaller than the sum of its proper divisors (31165683733376).

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

20689800874624 is an equidigital number, since it uses as much as digits as its factorization.

20689800874624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523136 (or 523110 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 64.

The spelling of 20689800874624 in words is "twenty trillion, six hundred eighty-nine billion, eight hundred million, eight hundred seventy-four thousand, six hundred twenty-four".