20162725 has 24 divisors (see below), whose sum is σ = 27507168. Its totient is φ = 14539200.

The previous prime is 20162717. The next prime is 20162761. The reversal of 20162725 is 52726102.

It is not a de Polignac number, because 20162725 - 2³ = 20162717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20162725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42942 + ... + 43408.

It is an arithmetic number, because the mean of its divisors is an integer number (1146132).

Almost surely, 2^20162725 is an apocalyptic number.

20162725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20162725 is a deficient number, since it is larger than the sum of its proper divisors (7344443).

20162725 is a wasteful number, since it uses less digits than its factorization.

20162725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20162725 is about 4490.2923067435. The cubic root of 20162725 is about 272.1759467517.

Adding to 20162725 its reverse (52726102), we get a palindrome (72888827).

It can be divided in two parts, 201 and 62725, that added together give a palindrome (62926).

The spelling of 20162725 in words is "twenty million, one hundred sixty-two thousand, seven hundred twenty-five".