20513368 has 8 divisors (see below), whose sum is σ = 38462580. Its totient is φ = 10256680.

The previous prime is 20513341. The next prime is 20513371. The reversal of 20513368 is 86331502.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282078 + ... + 1282093.

Almost surely, 2^20513368 is an apocalyptic number.

It is an amenable number.

20513368 is a deficient number, since it is larger than the sum of its proper divisors (17949212).

20513368 is a wasteful number, since it uses less digits than its factorization.

20513368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564177 (or 2564173 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20513368 is about 4529.1685771232. The cubic root of 20513368 is about 273.7446606271.

The spelling of 20513368 in words is "twenty million, five hundred thirteen thousand, three hundred sixty-eight".