18127970320 has 20 divisors (see below), whose sum is σ = 42147531180. Its totient is φ = 7251188096.

The previous prime is 18127970293. The next prime is 18127970321. The reversal of 18127970320 is 2307972181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5412250624 + 12715719696 = 73568^2 + 112764^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (18127970321) 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, 113299735 + ... + 113299894.

It is an arithmetic number, because the mean of its divisors is an integer number (2107376559).

Almost surely, 2^18127970320 is an apocalyptic number.

18127970320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18127970320 is an abundant number, since it is smaller than the sum of its proper divisors (24019560860).

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

18127970320 is a wasteful number, since it uses less digits than its factorization.

18127970320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226599642 (or 226599636 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 18127970320 in words is "eighteen billion, one hundred twenty-seven million, nine hundred seventy thousand, three hundred twenty".