20420418402 has 24 divisors (see below), whose sum is σ = 44338999536. Its totient is φ = 6792227736.

The previous prime is 20420418373. The next prime is 20420418419. The reversal of 20420418402 is 20481402402.

20420418402 is a `hidden beast` number, since 204 + 2 + 0 + 418 + 40 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1206228 + ... + 1223039.

It is an arithmetic number, because the mean of its divisors is an integer number (1847458314).

Almost surely, 2^20420418402 is an apocalyptic number.

20420418402 is an abundant number, since it is smaller than the sum of its proper divisors (23918581134).

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

20420418402 is a wasteful number, since it uses less digits than its factorization.

20420418402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429742 (or 2429739 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The spelling of 20420418402 in words is "twenty billion, four hundred twenty million, four hundred eighteen thousand, four hundred two".