20680785024 has 64 divisors (see below), whose sum is σ = 55025352480. Its totient is φ = 6882048000.

The previous prime is 20680784987. The next prime is 20680785067. The reversal of 20680785024 is 42058708602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 185979 + ... + 275589.

Almost surely, 2^20680785024 is an apocalyptic number.

20680785024 is a gapful number since it is divisible by the number (24) 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 20680785024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27512676240).

20680785024 is an abundant number, since it is smaller than the sum of its proper divisors (34344567456).

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

20680785024 is an equidigital number, since it uses as much as digits as its factorization.

20680785024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90229 (or 90217 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 20680785024 in words is "twenty billion, six hundred eighty million, seven hundred eighty-five thousand, twenty-four".