20275384 has 8 divisors (see below), whose sum is σ = 38016360. Its totient is φ = 10137688.

The previous prime is 20275369. The next prime is 20275391. The reversal of 20275384 is 48357202.

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

It is a super-2 number, since 2×20275384² = 822182392694912, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 1267204 + ... + 1267219.

It is an arithmetic number, because the mean of its divisors is an integer number (4752045).

Almost surely, 2^20275384 is an apocalyptic number.

It is an amenable number.

20275384 is a deficient number, since it is larger than the sum of its proper divisors (17740976).

20275384 is a wasteful number, since it uses less digits than its factorization.

20275384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534429 (or 2534425 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20275384 is about 4502.8195611195. The cubic root of 20275384 is about 272.6819322067.

The spelling of 20275384 in words is "twenty million, two hundred seventy-five thousand, three hundred eighty-four".