20420022628 has 12 divisors (see below), whose sum is σ = 35741962620. Its totient is φ = 10208033312.

The previous prime is 20420022593. The next prime is 20420022629. The reversal of 20420022628 is 82622002402.

It can be written as a sum of positive squares in 2 ways, for example, as 15720645924 + 4699376704 = 125382^2 + 68552^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20420022596 and 20420022605.

It is not an unprimeable number, because it can be changed into a prime (20420022629) 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, 471151 + ... + 512662.

It is an arithmetic number, because the mean of its divisors is an integer number (2978496885).

Almost surely, 2^20420022628 is an apocalyptic number.

It is an amenable number.

20420022628 is a deficient number, since it is larger than the sum of its proper divisors (15321939992).

20420022628 is a wasteful number, since it uses less digits than its factorization.

20420022628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989006 (or 989004 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The spelling of 20420022628 in words is "twenty billion, four hundred twenty million, twenty-two thousand, six hundred twenty-eight".