18742516 has 24 divisors (see below), whose sum is σ = 36860544. Its totient is φ = 8273760.

The previous prime is 18742501. The next prime is 18742523. The reversal of 18742516 is 61524781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6640 + ... + 9031.

It is an arithmetic number, because the mean of its divisors is an integer number (1535856).

Almost surely, 2^18742516 is an apocalyptic number.

It is an amenable number.

18742516 is a deficient number, since it is larger than the sum of its proper divisors (18118028).

18742516 is a wasteful number, since it uses less digits than its factorization.

18742516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15711 (or 15709 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 18742516 is about 4329.2627547886. The cubic root of 18742516 is about 265.6292912063.

The spelling of 18742516 in words is "eighteen million, seven hundred forty-two thousand, five hundred sixteen".