20390552387404 has 6 divisors (see below), whose sum is σ = 35683466677964. Its totient is φ = 10195276193700.

The previous prime is 20390552387389. The next prime is 20390552387419. The reversal of 20390552387404 is 40478325509302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20390552387389) and next prime (20390552387419).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2548819048422 + ... + 2548819048429.

Almost surely, 2^{20390552387404} is an apocalyptic number.

It is an amenable number.

20390552387404 is a deficient number, since it is larger than the sum of its proper divisors (15292914290560).

20390552387404 is a wasteful number, since it uses less digits than its factorization.

20390552387404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097638096855 (or 5097638096853 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 20390552387404 in words is "twenty trillion, three hundred ninety billion, five hundred fifty-two million, three hundred eighty-seven thousand, four hundred four".