18017928951 has 16 divisors (see below), whose sum is σ = 26270168448. Its totient is φ = 10894010400.

The previous prime is 18017928881. The next prime is 18017928953. The reversal of 18017928951 is 15982971081.

It is not a de Polignac number, because 18017928951 - 2⁷ = 18017928823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18017928894 and 18017928903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18017928953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634561 + ... + 662346.

It is an arithmetic number, because the mean of its divisors is an integer number (1641885528).

Almost surely, 2^18017928951 is an apocalyptic number.

18017928951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18017928951 is a deficient number, since it is larger than the sum of its proper divisors (8252239497).

18017928951 is a wasteful number, since it uses less digits than its factorization.

18017928951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297342.

The product of its (nonzero) digits is 362880, while the sum is 51.

The spelling of 18017928951 in words is "eighteen billion, seventeen million, nine hundred twenty-eight thousand, nine hundred fifty-one".