20874172 has 12 divisors (see below), whose sum is σ = 39850776. Its totient is φ = 9488240.

The previous prime is 20874169. The next prime is 20874173. The reversal of 20874172 is 27147802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874173) 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, 237163 + ... + 237250.

It is an arithmetic number, because the mean of its divisors is an integer number (3320898).

Almost surely, 2^20874172 is an apocalyptic number.

20874172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20874172 is a deficient number, since it is larger than the sum of its proper divisors (18976604).

20874172 is a wasteful number, since it uses less digits than its factorization.

20874172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474428 (or 474426 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 20874172 is about 4568.8261074372. The cubic root of 20874172 is about 275.3402817959.

The spelling of 20874172 in words is "twenty million, eight hundred seventy-four thousand, one hundred seventy-two".