20564134 has 8 divisors (see below), whose sum is σ = 31017168. Its totient is φ = 10225080.

The previous prime is 20564123. The next prime is 20564147. The reversal of 20564134 is 43146502.

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

It is a junction number, because it is equal to n+sod(n) for n = 20564099 and 20564108.

It is a congruent number.

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, 28042 + ... + 28765.

It is an arithmetic number, because the mean of its divisors is an integer number (3877146).

Almost surely, 2^20564134 is an apocalyptic number.

20564134 is a deficient number, since it is larger than the sum of its proper divisors (10453034).

20564134 is a wasteful number, since it uses less digits than its factorization.

20564134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56990.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20564134 is about 4534.7694538973. The cubic root of 20564134 is about 273.9702935454.

The spelling of 20564134 in words is "twenty million, five hundred sixty-four thousand, one hundred thirty-four".