20566602402 has 32 divisors (see below), whose sum is σ = 43337419200. Its totient is φ = 6488820288.

The previous prime is 20566602401. The next prime is 20566602443. The reversal of 20566602402 is 20420666502.

It is not an unprimeable number, because it can be changed into a prime (20566602401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45088 + ... + 207764.

It is an arithmetic number, because the mean of its divisors is an integer number (1354294350).

Almost surely, 2^20566602402 is an apocalyptic number.

20566602402 is an abundant number, since it is smaller than the sum of its proper divisors (22770816798).

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

20566602402 is a wasteful number, since it uses less digits than its factorization.

20566602402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163810.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20566602402 in words is "twenty billion, five hundred sixty-six million, six hundred two thousand, four hundred two".