20253172 has 12 divisors (see below), whose sum is σ = 36267616. Its totient is φ = 9891000.

The previous prime is 20253169. The next prime is 20253173. The reversal of 20253172 is 27135202.

It is a super-3 number, since 3×20253172³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253173) 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, 58704 + ... + 59047.

Almost surely, 2^20253172 is an apocalyptic number.

It is an amenable number.

20253172 is a deficient number, since it is larger than the sum of its proper divisors (16014444).

20253172 is a wasteful number, since it uses less digits than its factorization.

20253172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117798 (or 117796 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20253172 is about 4500.3524306436. The cubic root of 20253172 is about 272.5823200497.

Adding to 20253172 its reverse (27135202), we get a palindrome (47388374).

The spelling of 20253172 in words is "twenty million, two hundred fifty-three thousand, one hundred seventy-two".