18421427460 has 48 divisors (see below), whose sum is σ = 54614117376. Its totient is φ = 4623416832.

The previous prime is 18421427449. The next prime is 18421427489. The reversal of 18421427460 is 6472412481.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9029092 + ... + 9031131.

It is an arithmetic number, because the mean of its divisors is an integer number (1137794112).

Almost surely, 2^18421427460 is an apocalyptic number.

18421427460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18421427460 is an abundant number, since it is smaller than the sum of its proper divisors (36192689916).

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

18421427460 is a wasteful number, since it uses less digits than its factorization.

18421427460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18060252 (or 18060250 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 18421427460 in words is "eighteen billion, four hundred twenty-one million, four hundred twenty-seven thousand, four hundred sixty".