20172612 has 24 divisors (see below), whose sum is σ = 47226816. Its totient is φ = 6701728.

The previous prime is 20172589. The next prime is 20172613. The reversal of 20172612 is 21627102.

It is not an unprimeable number, because it can be changed into a prime (20172613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (1967784).

Almost surely, 2^20172612 is an apocalyptic number.

It is an amenable number.

20172612 is an abundant number, since it is smaller than the sum of its proper divisors (27054204).

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

20172612 is a wasteful number, since it uses less digits than its factorization.

20172612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627 (or 5625 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20172612 is about 4491.3931023681. The cubic root of 20172612 is about 272.2204275754.

Adding to 20172612 its reverse (21627102), we get a palindrome (41799714).

The spelling of 20172612 in words is "twenty million, one hundred seventy-two thousand, six hundred twelve".