20279976 has 16 divisors (see below), whose sum is σ = 50700000. Its totient is φ = 6759984.

The previous prime is 20279969. The next prime is 20279981. The reversal of 20279976 is 67997202.

It is a super-2 number, since 2×20279976² = 822554853121152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422476 + ... + 422523.

It is an arithmetic number, because the mean of its divisors is an integer number (3168750).

Almost surely, 2^20279976 is an apocalyptic number.

It is an amenable number.

20279976 is an abundant number, since it is smaller than the sum of its proper divisors (30420024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20279976 is a wasteful number, since it uses less digits than its factorization.

20279976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845008 (or 845004 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 20279976 is about 4503.3294349847. The cubic root of 20279976 is about 272.7025164599.

The spelling of 20279976 in words is "twenty million, two hundred seventy-nine thousand, nine hundred seventy-six".