18310779380 has 12 divisors (see below), whose sum is σ = 38452636740. Its totient is φ = 7324311744.

The previous prime is 18310779367. The next prime is 18310779391. The reversal of 18310779380 is 8397701381.

It can be written as a sum of positive squares in 2 ways, for example, as 13746155536 + 4564623844 = 117244^2 + 67562^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457769465 + ... + 457769504.

It is an arithmetic number, because the mean of its divisors is an integer number (3204386395).

Almost surely, 2^18310779380 is an apocalyptic number.

18310779380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18310779380 is an abundant number, since it is smaller than the sum of its proper divisors (20141857360).

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

18310779380 is a wasteful number, since it uses less digits than its factorization.

18310779380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915538978 (or 915538976 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 18310779380 in words is "eighteen billion, three hundred ten million, seven hundred seventy-nine thousand, three hundred eighty".