20472375 has 64 divisors (see below), whose sum is σ = 42531840. Its totient is φ = 8496000.

The previous prime is 20472349. The next prime is 20472377. The reversal of 20472375 is 57327402.

It is not a de Polignac number, because 20472375 - 2⁷ = 20472247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472377) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28521 + ... + 29229.

It is an arithmetic number, because the mean of its divisors is an integer number (664560).

Almost surely, 2^20472375 is an apocalyptic number.

20472375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20472375 is an abundant number, since it is smaller than the sum of its proper divisors (22059465).

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

20472375 is a wasteful number, since it uses less digits than its factorization.

20472375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20472375 is about 4524.6408697266. The cubic root of 20472375 is about 273.5621926530.

Adding to 20472375 its reverse (57327402), we get a palindrome (77799777).

The spelling of 20472375 in words is "twenty million, four hundred seventy-two thousand, three hundred seventy-five".