20858102464 has 14 divisors (see below), whose sum is σ = 41390297204. Its totient is φ = 10429051200.

The previous prime is 20858102443. The next prime is 20858102467. The reversal of 20858102464 is 46420185802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20858102467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162953862 + ... + 162953989.

Almost surely, 2^20858102464 is an apocalyptic number.

It is an amenable number.

20858102464 is a deficient number, since it is larger than the sum of its proper divisors (20532194740).

20858102464 is an equidigital number, since it uses as much as digits as its factorization.

20858102464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325907863 (or 325907853 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 20858102464 in words is "twenty billion, eight hundred fifty-eight million, one hundred two thousand, four hundred sixty-four".