20010172 has 24 divisors (see below), whose sum is σ = 43099616. Its totient is φ = 7915968.

The previous prime is 20010157. The next prime is 20010187. The reversal of 20010172 is 27101002.

It is an interprime number because it is at equal distance from previous prime (20010157) and next prime (20010187).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent 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, 27123 + ... + 27850.

Almost surely, 2^20010172 is an apocalyptic number.

It is an amenable number.

20010172 is an abundant number, since it is smaller than the sum of its proper divisors (23089444).

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

20010172 is a wasteful number, since it uses less digits than its factorization.

20010172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54997 (or 54995 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20010172 is about 4473.2730746066. The cubic root of 20010172 is about 271.4877722867.

Adding to 20010172 its reverse (27101002), we get a palindrome (47111174).

The spelling of 20010172 in words is "twenty million, ten thousand, one hundred seventy-two".