18740405464 has 64 divisors (see below), whose sum is σ = 40923338400. Its totient is φ = 8017208320.

The previous prime is 18740405461. The next prime is 18740405471. The reversal of 18740405464 is 46450404781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18740405464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740405461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129252 + ... + 232780.

Almost surely, 2^18740405464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18740405464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20461669200).

18740405464 is an abundant number, since it is smaller than the sum of its proper divisors (22182932936).

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

18740405464 is a wasteful number, since it uses less digits than its factorization.

18740405464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103585 (or 103559 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 18740405464 in words is "eighteen billion, seven hundred forty million, four hundred five thousand, four hundred sixty-four".