20667325 has 24 divisors (see below), whose sum is σ = 31015872. Its totient is φ = 13336320.

The previous prime is 20667299. The next prime is 20667331. The reversal of 20667325 is 52376602.

It is not a de Polignac number, because 20667325 - 2⁵ = 20667293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (1292328).

Almost surely, 2^20667325 is an apocalyptic number.

20667325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20667325 is a deficient number, since it is larger than the sum of its proper divisors (10348547).

20667325 is a wasteful number, since it uses less digits than its factorization.

20667325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6981 (or 6976 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20667325 is about 4546.1329720984. The cubic root of 20667325 is about 274.4277909121.

The spelling of 20667325 in words is "twenty million, six hundred sixty-seven thousand, three hundred twenty-five".