20313525 has 24 divisors (see below), whose sum is σ = 34672384. Its totient is φ = 10483200.

The previous prime is 20313511. The next prime is 20313563. The reversal of 20313525 is 52531302.

It is not a de Polignac number, because 20313525 - 2⁴ = 20313509 is a prime.

It is a Curzon number.

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, 2044 + ... + 6693.

Almost surely, 2^20313525 is an apocalyptic number.

20313525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20313525 is a deficient number, since it is larger than the sum of its proper divisors (14358859).

20313525 is a wasteful number, since it uses less digits than its factorization.

20313525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8781 (or 8776 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20313525 is about 4507.0528064357. The cubic root of 20313525 is about 272.8528101351.

Adding to 20313525 its reverse (52531302), we get a palindrome (72844827).

The spelling of 20313525 in words is "twenty million, three hundred thirteen thousand, five hundred twenty-five".