20564142622 has 4 divisors (see below), whose sum is σ = 30846213936. Its totient is φ = 10282071310.

The previous prime is 20564142593. The next prime is 20564142649. The reversal of 20564142622 is 22624146502.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5141035654 + ... + 5141035657.

It is an arithmetic number, because the mean of its divisors is an integer number (7711553484).

Almost surely, 2^20564142622 is an apocalyptic number.

20564142622 is a deficient number, since it is larger than the sum of its proper divisors (10282071314).

20564142622 is a wasteful number, since it uses less digits than its factorization.

20564142622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10282071313.

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 20564142622 in words is "twenty billion, five hundred sixty-four million, one hundred forty-two thousand, six hundred twenty-two".