20514664 has 8 divisors (see below), whose sum is σ = 38465010. Its totient is φ = 10257328.

The previous prime is 20514619. The next prime is 20514677. The reversal of 20514664 is 46641502.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 8749764 = 3430^2 + 2958^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 1282159 + ... + 1282174.

Almost surely, 2^20514664 is an apocalyptic number.

It is an amenable number.

20514664 is a deficient number, since it is larger than the sum of its proper divisors (17950346).

20514664 is a wasteful number, since it uses less digits than its factorization.

20514664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564339 (or 2564335 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20514664 is about 4529.3116474802. The cubic root of 20514664 is about 273.7504254144.

The spelling of 20514664 in words is "twenty million, five hundred fourteen thousand, six hundred sixty-four".