20325146 has 16 divisors (see below), whose sum is σ = 32356800. Its totient is φ = 9554688.

The previous prime is 20325133. The next prime is 20325161. The reversal of 20325146 is 64152302.

20325146 = T₃₈₈ + T₃₈₉ + ... + T₅₆₄.

It is a super-2 number, since 2×20325146² = 826223119842632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031 + ... + 6458.

It is an arithmetic number, because the mean of its divisors is an integer number (2022300).

Almost surely, 2^20325146 is an apocalyptic number.

20325146 is a deficient number, since it is larger than the sum of its proper divisors (12031654).

20325146 is a wasteful number, since it uses less digits than its factorization.

20325146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7573.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20325146 is about 4508.3418237751. The cubic root of 20325146 is about 272.9048316009.

Adding to 20325146 its reverse (64152302), we get a palindrome (84477448).

The spelling of 20325146 in words is "twenty million, three hundred twenty-five thousand, one hundred forty-six".