20653172 has 12 divisors (see below), whose sum is σ = 37714656. Its totient is φ = 9877560.

The previous prime is 20653169. The next prime is 20653189. The reversal of 20653172 is 27135602.

It is a super-3 number, since 3×20653172³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112154 + ... + 112337.

It is an arithmetic number, because the mean of its divisors is an integer number (3142888).

Almost surely, 2^20653172 is an apocalyptic number.

It is an amenable number.

20653172 is a deficient number, since it is larger than the sum of its proper divisors (17061484).

20653172 is a wasteful number, since it uses less digits than its factorization.

20653172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224518 (or 224516 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20653172 is about 4544.5761078455. The cubic root of 20653172 is about 274.3651338202.

Adding to 20653172 its reverse (27135602), we get a palindrome (47788774).

The spelling of 20653172 in words is "twenty million, six hundred fifty-three thousand, one hundred seventy-two".