20538557002 has 16 divisors (see below), whose sum is σ = 31186999872. Its totient is φ = 10142953920.

The previous prime is 20538556777. The next prime is 20538557027. The reversal of 20538557002 is 20075583502.

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, 743563 + ... + 770689.

It is an arithmetic number, because the mean of its divisors is an integer number (1949187492).

Almost surely, 2^20538557002 is an apocalyptic number.

20538557002 is a deficient number, since it is larger than the sum of its proper divisors (10648442870).

20538557002 is a wasteful number, since it uses less digits than its factorization.

20538557002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31773.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 20538557002 in words is "twenty billion, five hundred thirty-eight million, five hundred fifty-seven thousand, two".