20564102 has 8 divisors (see below), whose sum is σ = 33218976. Its totient is φ = 9491112.

The previous prime is 20564087. The next prime is 20564113. The reversal of 20564102 is 20146502.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395438 + ... + 395489.

It is an arithmetic number, because the mean of its divisors is an integer number (4152372).

Almost surely, 2^20564102 is an apocalyptic number.

20564102 is a deficient number, since it is larger than the sum of its proper divisors (12654874).

20564102 is a wasteful number, since it uses less digits than its factorization.

20564102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790942.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20564102 is about 4534.7659256019. The cubic root of 20564102 is about 273.9701514362.

The spelling of 20564102 in words is "twenty million, five hundred sixty-four thousand, one hundred two".