20426640604 has 12 divisors (see below), whose sum is σ = 35775250000. Its totient is φ = 10205140608.

The previous prime is 20426640601. The next prime is 20426640613. The reversal of 20426640604 is 40604662402.

It is a self number, because there is not a number n which added to its sum of digits gives 20426640604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426640601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039304 + ... + 2049295.

Almost surely, 2^20426640604 is an apocalyptic number.

It is an amenable number.

20426640604 is a deficient number, since it is larger than the sum of its proper divisors (15348609396).

20426640604 is a wasteful number, since it uses less digits than its factorization.

20426640604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089852 (or 4089850 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 20426640604 in words is "twenty billion, four hundred twenty-six million, six hundred forty thousand, six hundred four".