20774872 has 16 divisors (see below), whose sum is σ = 39090240. Its totient is φ = 10350816.

The previous prime is 20774869. The next prime is 20774881. The reversal of 20774872 is 27847702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (2443140).

Almost surely, 2^20774872 is an apocalyptic number.

It is an amenable number.

20774872 is a deficient number, since it is larger than the sum of its proper divisors (18315368).

20774872 is a wasteful number, since it uses less digits than its factorization.

20774872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9162 (or 9158 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 20774872 is about 4557.9460286405. The cubic root of 20774872 is about 274.9029828573.

The spelling of 20774872 in words is "twenty million, seven hundred seventy-four thousand, eight hundred seventy-two".