20574916 has 6 divisors (see below), whose sum is σ = 36006110. Its totient is φ = 10287456.

The previous prime is 20574899. The next prime is 20574959. The reversal of 20574916 is 61947502.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 3385600 = 4146^2 + 1840^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2571861 + ... + 2571868.

Almost surely, 2^20574916 is an apocalyptic number.

It is an amenable number.

20574916 is a deficient number, since it is larger than the sum of its proper divisors (15431194).

20574916 is a wasteful number, since it uses less digits than its factorization.

20574916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143733 (or 5143731 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20574916 is about 4535.9581126814. The cubic root of 20574916 is about 274.0181670516.

The spelling of 20574916 in words is "twenty million, five hundred seventy-four thousand, nine hundred sixteen".