20566667996 has 24 divisors (see below), whose sum is σ = 41140884960. Its totient is φ = 8812668672.

The previous prime is 20566667981. The next prime is 20566668013. The reversal of 20566667996 is 69976666502.

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, 94736 + ... + 223848.

It is an arithmetic number, because the mean of its divisors is an integer number (1714203540).

Almost surely, 2^20566667996 is an apocalyptic number.

It is an amenable number.

20566667996 is an abundant number, since it is smaller than the sum of its proper divisors (20574216964).

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

20566667996 is a wasteful number, since it uses less digits than its factorization.

20566667996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134813 (or 134811 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 62.

The spelling of 20566667996 in words is "twenty billion, five hundred sixty-six million, six hundred sixty-seven thousand, nine hundred ninety-six".