20867925 has 48 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 9661440.

The previous prime is 20867911. The next prime is 20867933. The reversal of 20867925 is 52976802.

It is a happy number.

It is not a de Polignac number, because 20867925 - 2⁸ = 20867669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15946 + ... + 17204.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^20867925 is an apocalyptic number.

20867925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20867925 is a deficient number, since it is larger than the sum of its proper divisors (18504555).

20867925 is a wasteful number, since it uses less digits than its factorization.

20867925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 20867925 is about 4568.1424014582. The cubic root of 20867925 is about 275.3128120859.

It can be divided in two parts, 2086 and 7925, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 20867925 in words is "twenty million, eight hundred sixty-seven thousand, nine hundred twenty-five".