20365988 has 12 divisors (see below), whose sum is σ = 35732172. Its totient is φ = 10156800.

The previous prime is 20365979. The next prime is 20365991. The reversal of 20365988 is 88956302.

It can be written as a sum of positive squares in 2 ways, for example, as 13853284 + 6512704 = 3722^2 + 2552^2 .

It is a super-2 number, since 2×20365988² = 829546934432288, which contains 22 as substring.

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, 4745 + ... + 7952.

It is an arithmetic number, because the mean of its divisors is an integer number (2977681).

Almost surely, 2^20365988 is an apocalyptic number.

It is an amenable number.

20365988 is a deficient number, since it is larger than the sum of its proper divisors (15366184).

20365988 is a wasteful number, since it uses less digits than its factorization.

20365988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13102 (or 13100 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 20365988 is about 4512.8691538754. The cubic root of 20365988 is about 273.0875038723.

The spelling of 20365988 in words is "twenty million, three hundred sixty-five thousand, nine hundred eighty-eight".