18807150455 has 4 divisors (see below), whose sum is σ = 22568580552. Its totient is φ = 15045720360.

The previous prime is 18807150449. The next prime is 18807150457. The reversal of 18807150455 is 55405170881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55405170881 = 47 ⋅1178833423.

It is a de Polignac number, because none of the positive numbers 2^k-18807150455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18807150457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880715041 + ... + 1880715050.

It is an arithmetic number, because the mean of its divisors is an integer number (5642145138).

Almost surely, 2^18807150455 is an apocalyptic number.

18807150455 is a deficient number, since it is larger than the sum of its proper divisors (3761430097).

18807150455 is an equidigital number, since it uses as much as digits as its factorization.

18807150455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761430096.

The product of its (nonzero) digits is 224000, while the sum is 44.

The spelling of 18807150455 in words is "eighteen billion, eight hundred seven million, one hundred fifty thousand, four hundred fifty-five".