20053172 has 6 divisors (see below), whose sum is σ = 35093058. Its totient is φ = 10026584.

The previous prime is 20053153. The next prime is 20053211. The reversal of 20053172 is 27135002.

It can be written as a sum of positive squares in only one way, i.e., 14167696 + 5885476 = 3764^2 + 2426^2 .

It is a super-3 number, since 3×20053172³ (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 as a sum of consecutive naturals, namely, 2506643 + ... + 2506650.

It is an arithmetic number, because the mean of its divisors is an integer number (5848843).

Almost surely, 2^20053172 is an apocalyptic number.

It is an amenable number.

20053172 is a deficient number, since it is larger than the sum of its proper divisors (15039886).

20053172 is a wasteful number, since it uses less digits than its factorization.

20053172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013297 (or 5013295 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20053172 is about 4478.0768193500. The cubic root of 20053172 is about 271.6821004861.

Adding to 20053172 its reverse (27135002), we get a palindrome (47188174).

The spelling of 20053172 in words is "twenty million, fifty-three thousand, one hundred seventy-two".