20502675720 has 128 divisors (see below), whose sum is σ = 68565974400. Its totient is φ = 5449483008.

The previous prime is 20502675703. The next prime is 20502675749. The reversal of 20502675720 is 2757620502.

20502675720 is a `hidden beast` number, since 20 + 5 + 0 + 2 + 67 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300642 + ... + 362478.

It is an arithmetic number, because the mean of its divisors is an integer number (535671675).

Almost surely, 2^20502675720 is an apocalyptic number.

20502675720 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 20502675720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34282987200).

20502675720 is an abundant number, since it is smaller than the sum of its proper divisors (48063298680).

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

20502675720 is a wasteful number, since it uses less digits than its factorization.

20502675720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62164 (or 62154 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The spelling of 20502675720 in words is "twenty billion, five hundred two million, six hundred seventy-five thousand, seven hundred twenty".