20564074 has 8 divisors (see below), whose sum is σ = 31909860. Its totient is φ = 9927456.

The previous prime is 20564069. The next prime is 20564081. The reversal of 20564074 is 47046502.

It can be written as a sum of positive squares in 2 ways, for example, as 19298449 + 1265625 = 4393^2 + 1125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20564074² = 845762278954952, 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, 177219 + ... + 177334.

Almost surely, 2^20564074 is an apocalyptic number.

20564074 is a deficient number, since it is larger than the sum of its proper divisors (11345786).

20564074 is a wasteful number, since it uses less digits than its factorization.

20564074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354584.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20564074 is about 4534.7628383412. The cubic root of 20564074 is about 273.9700270906.

The spelling of 20564074 in words is "twenty million, five hundred sixty-four thousand, seventy-four".