20976925 has 12 divisors (see below), whose sum is σ = 26851456. Its totient is φ = 16239600.

The previous prime is 20976913. The next prime is 20976937. The reversal of 20976925 is 52967902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20976913) and next prime (20976937).

It is not a de Polignac number, because 20976925 - 2⁷ = 20976797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12759 + ... + 14308.

Almost surely, 2^20976925 is an apocalyptic number.

20976925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20976925 is a deficient number, since it is larger than the sum of its proper divisors (5874531).

20976925 is a wasteful number, since it uses less digits than its factorization.

20976925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27108 (or 27103 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 20976925 is about 4580.0573140519. The cubic root of 20976925 is about 275.7913295315.

The spelling of 20976925 in words is "twenty million, nine hundred seventy-six thousand, nine hundred twenty-five".