18400376825 has 12 divisors (see below), whose sum is σ = 22822227900. Its totient is φ = 14716584960.

The previous prime is 18400376791. The next prime is 18400376843. The reversal of 18400376825 is 52867300481.

It can be written as a sum of positive squares in 6 ways, for example, as 2460556816 + 15939820009 = 49604^2 + 126253^2 .

It is not a de Polignac number, because 18400376825 - 2¹⁴ = 18400360441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10337 + ... + 192113.

It is an arithmetic number, because the mean of its divisors is an integer number (1901852325).

Almost surely, 2^18400376825 is an apocalyptic number.

It is an amenable number.

18400376825 is a deficient number, since it is larger than the sum of its proper divisors (4421851075).

18400376825 is a wasteful number, since it uses less digits than its factorization.

18400376825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185836 (or 185831 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 18400376825 in words is "eighteen billion, four hundred million, three hundred seventy-six thousand, eight hundred twenty-five".