20679976 has 32 divisors (see below), whose sum is σ = 40711680. Its totient is φ = 9835200.

The previous prime is 20679959. The next prime is 20679977. The reversal of 20679976 is 67997602.

It is a super-2 number, since 2×20679976² = 855322814721152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14445 + ... + 15811.

It is an arithmetic number, because the mean of its divisors is an integer number (1272240).

Almost surely, 2^20679976 is an apocalyptic number.

It is an amenable number.

20679976 is a deficient number, since it is larger than the sum of its proper divisors (20031704).

20679976 is a wasteful number, since it uses less digits than its factorization.

20679976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 20679976 is about 4547.5241615631. The cubic root of 20679976 is about 274.4837742551.

The spelling of 20679976 in words is "twenty million, six hundred seventy-nine thousand, nine hundred seventy-six".