20206042656 has 48 divisors (see below), whose sum is σ = 53063416224. Its totient is φ = 6732483584.

The previous prime is 20206042627. The next prime is 20206042663. The reversal of 20206042656 is 65624060202.

It is a tau number, because it is divible by the number of its divisors (48).

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, 188491 + ... + 275573.

It is an arithmetic number, because the mean of its divisors is an integer number (1105487838).

Almost surely, 2^20206042656 is an apocalyptic number.

It is an amenable number.

20206042656 is an abundant number, since it is smaller than the sum of its proper divisors (32857373568).

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

20206042656 is a wasteful number, since it uses less digits than its factorization.

20206042656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89513 (or 89505 counting only the distinct ones).

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

The spelling of 20206042656 in words is "twenty billion, two hundred six million, forty-two thousand, six hundred fifty-six".