20622407172 has 24 divisors (see below), whose sum is σ = 49419463296. Its totient is φ = 6688348128.

The previous prime is 20622407153. The next prime is 20622407237. The reversal of 20622407172 is 27170422602.

It is a happy 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, 23222988 + ... + 23223875.

It is an arithmetic number, because the mean of its divisors is an integer number (2059144304).

Almost surely, 2^20622407172 is an apocalyptic number.

It is an amenable number.

20622407172 is an abundant number, since it is smaller than the sum of its proper divisors (28797056124).

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

20622407172 is a wasteful number, since it uses less digits than its factorization.

20622407172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46446907 (or 46446905 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

Adding to 20622407172 its reverse (27170422602), we get a palindrome (47792829774).

The spelling of 20622407172 in words is "twenty billion, six hundred twenty-two million, four hundred seven thousand, one hundred seventy-two".