20557075502 has 16 divisors (see below), whose sum is σ = 31486210272. Its totient is φ = 10063728000.

The previous prime is 20557075499. The next prime is 20557075573.

20557075502 is nontrivially palindromic in base 10.

It is a congruent number.

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, 493874 + ... + 533877.

It is an arithmetic number, because the mean of its divisors is an integer number (1967888142).

Almost surely, 2^20557075502 is an apocalyptic number.

20557075502 is a deficient number, since it is larger than the sum of its proper divisors (10929134770).

20557075502 is a wasteful number, since it uses less digits than its factorization.

20557075502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027963.

The product of its (nonzero) digits is 122500, while the sum is 38.

The spelling of 20557075502 in words is "twenty billion, five hundred fifty-seven million, seventy-five thousand, five hundred two".