20057008536 has 128 divisors (see below), whose sum is σ = 58366080000. Its totient is φ = 6373261440.

The previous prime is 20057008501. The next prime is 20057008541. The reversal of 20057008536 is 63580075002.

20057008536 is a `hidden beast` number, since 2 + 0 + 0 + 570 + 0 + 85 + 3 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20057008536.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474591 + ... + 515121.

It is an arithmetic number, because the mean of its divisors is an integer number (455985000).

Almost surely, 2^20057008536 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 20057008536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29183040000).

20057008536 is an abundant number, since it is smaller than the sum of its proper divisors (38309071464).

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

20057008536 is a wasteful number, since it uses less digits than its factorization.

20057008536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40654 (or 40644 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20057008536 in words is "twenty billion, fifty-seven million, eight thousand, five hundred thirty-six".