20338552172 has 6 divisors (see below), whose sum is σ = 35592466308. Its totient is φ = 10169276084.

The previous prime is 20338552159. The next prime is 20338552177. The reversal of 20338552172 is 27125583302.

It is not an unprimeable number, because it can be changed into a prime (20338552177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2542319018 + ... + 2542319025.

It is an arithmetic number, because the mean of its divisors is an integer number (5932077718).

Almost surely, 2^20338552172 is an apocalyptic number.

It is an amenable number.

20338552172 is a deficient number, since it is larger than the sum of its proper divisors (15253914136).

20338552172 is a wasteful number, since it uses less digits than its factorization.

20338552172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084638047 (or 5084638045 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 20338552172 in words is "twenty billion, three hundred thirty-eight million, five hundred fifty-two thousand, one hundred seventy-two".