20747420404 has 96 divisors (see below), whose sum is σ = 39086359200. Its totient is φ = 9621504000.

The previous prime is 20747420399. The next prime is 20747420423. The reversal of 20747420404 is 40402474702.

It can be written as a sum of positive squares in 16 ways, for example, as 69555600 + 20677864804 = 8340^2 + 143798^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20747420404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59448022 + ... + 59448370.

It is an arithmetic number, because the mean of its divisors is an integer number (407149575).

Almost surely, 2^20747420404 is an apocalyptic number.

It is an amenable number.

20747420404 is a deficient number, since it is larger than the sum of its proper divisors (18338938796).

20747420404 is a wasteful number, since it uses less digits than its factorization.

20747420404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 34.

The spelling of 20747420404 in words is "twenty billion, seven hundred forty-seven million, four hundred twenty thousand, four hundred four".