20404004646 has 16 divisors (see below), whose sum is σ = 40825119600. Its totient is φ = 6798483168.

The previous prime is 20404004629. The next prime is 20404004657. The reversal of 20404004646 is 64640040402.

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, 697401 + ... + 726068.

It is an arithmetic number, because the mean of its divisors is an integer number (2551569975).

Almost surely, 2^20404004646 is an apocalyptic number.

20404004646 is an abundant number, since it is smaller than the sum of its proper divisors (20421114954).

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

20404004646 is a wasteful number, since it uses less digits than its factorization.

20404004646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425863.

The product of its (nonzero) digits is 18432, while the sum is 30.

The spelling of 20404004646 in words is "twenty billion, four hundred four million, four thousand, six hundred forty-six".