18471280252 has 12 divisors (see below), whose sum is σ = 32344189696. Its totient is φ = 9230083200.

The previous prime is 18471280211. The next prime is 18471280259. The reversal of 18471280252 is 25208217481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18471280259) 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, 1381749 + ... + 1395052.

Almost surely, 2^18471280252 is an apocalyptic number.

It is an amenable number.

18471280252 is a deficient number, since it is larger than the sum of its proper divisors (13872909444).

18471280252 is a wasteful number, since it uses less digits than its factorization.

18471280252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778468 (or 2778466 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 18471280252 in words is "eighteen billion, four hundred seventy-one million, two hundred eighty thousand, two hundred fifty-two".