18800379045 has 144 divisors (see below), whose sum is σ = 39454728768. Its totient is φ = 8563242240.

The previous prime is 18800379043. The next prime is 18800379079. The reversal of 18800379045 is 54097300881.

It is not a de Polignac number, because 18800379045 - 2¹ = 18800379043 is a prime.

It is a super-2 number, since 2×18800379045² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18800379043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 27207150 + ... + 27207840.

It is an arithmetic number, because the mean of its divisors is an integer number (273991172).

Almost surely, 2^18800379045 is an apocalyptic number.

18800379045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18800379045 is an abundant number, since it is smaller than the sum of its proper divisors (20654349723).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18800379045 is an equidigital number, since it uses as much as digits as its factorization.

18800379045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 18800379045 in words is "eighteen billion, eight hundred million, three hundred seventy-nine thousand, forty-five".