20420636284 has 12 divisors (see below), whose sum is σ = 35837351424. Its totient is φ = 10181393024.

The previous prime is 20420636267. The next prime is 20420636321. The reversal of 20420636284 is 48263602402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7229692 + ... + 7232515.

It is an arithmetic number, because the mean of its divisors is an integer number (2986445952).

Almost surely, 2^20420636284 is an apocalyptic number.

It is an amenable number.

20420636284 is a deficient number, since it is larger than the sum of its proper divisors (15416715140).

20420636284 is a wasteful number, since it uses less digits than its factorization.

20420636284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14462564 (or 14462562 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 20420636284 in words is "twenty billion, four hundred twenty million, six hundred thirty-six thousand, two hundred eighty-four".