18913020451 has 32 divisors (see below), whose sum is σ = 23143680000. Its totient is φ = 15274562688.

The previous prime is 18913020443. The next prime is 18913020457. The reversal of 18913020451 is 15402031981.

It is not a de Polignac number, because 18913020451 - 2³ = 18913020443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18913020457) 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 in 31 ways as a sum of consecutive naturals, for example, 107350 + ... + 222148.

It is an arithmetic number, because the mean of its divisors is an integer number (723240000).

Almost surely, 2^18913020451 is an apocalyptic number.

18913020451 is a deficient number, since it is larger than the sum of its proper divisors (4230659549).

18913020451 is a wasteful number, since it uses less digits than its factorization.

18913020451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114883.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 18913020451 in words is "eighteen billion, nine hundred thirteen million, twenty thousand, four hundred fifty-one".