20538976 has 12 divisors (see below), whose sum is σ = 40436172. Its totient is φ = 10269472.

The previous prime is 20538967. The next prime is 20538983. The reversal of 20538976 is 67983502.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 320890 + ... + 320953.

It is an arithmetic number, because the mean of its divisors is an integer number (3369681).

Almost surely, 2^20538976 is an apocalyptic number.

It is an amenable number.

20538976 is a deficient number, since it is larger than the sum of its proper divisors (19897196).

20538976 is an equidigital number, since it uses as much as digits as its factorization.

20538976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641853 (or 641845 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20538976 is about 4531.9947043217. The cubic root of 20538976 is about 273.8585235851.

The spelling of 20538976 in words is "twenty million, five hundred thirty-eight thousand, nine hundred seventy-six".