18277214440 has 32 divisors (see below), whose sum is σ = 41585805000. Its totient is φ = 7228739584.

The previous prime is 18277214413. The next prime is 18277214443. The reversal of 18277214440 is 4441277281.

It can be written as a sum of positive squares in 4 ways, for example, as 16411147236 + 1866067204 = 128106^2 + 43198^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18277214393 and 18277214402.

It is not an unprimeable number, because it can be changed into a prime (18277214443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563465 + ... + 2570584.

Almost surely, 2^18277214440 is an apocalyptic number.

18277214440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18277214440 is an abundant number, since it is smaller than the sum of its proper divisors (23308590560).

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

18277214440 is a wasteful number, since it uses less digits than its factorization.

18277214440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134149 (or 5134145 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The spelling of 18277214440 in words is "eighteen billion, two hundred seventy-seven million, two hundred fourteen thousand, four hundred forty".