20747976 has 32 divisors (see below), whose sum is σ = 52029600. Its totient is φ = 6894720.

The previous prime is 20747941. The next prime is 20747983. The reversal of 20747976 is 67974702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7956 + ... + 10236.

It is an arithmetic number, because the mean of its divisors is an integer number (1625925).

Almost surely, 2^20747976 is an apocalyptic number.

It is an amenable number.

20747976 is an abundant number, since it is smaller than the sum of its proper divisors (31281624).

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

20747976 is a wasteful number, since it uses less digits than its factorization.

20747976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2665 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 42.

The square root of 20747976 is about 4554.9946212921. The cubic root of 20747976 is about 274.7842980716.

The spelling of 20747976 in words is "twenty million, seven hundred forty-seven thousand, nine hundred seventy-six".