18902542 has 8 divisors (see below), whose sum is σ = 29013336. Its totient is φ = 9231432.

The previous prime is 18902537. The next prime is 18902557. The reversal of 18902542 is 24520981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×18902542³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109813 + ... + 109984.

It is an arithmetic number, because the mean of its divisors is an integer number (3626667).

Almost surely, 2^18902542 is an apocalyptic number.

18902542 is a deficient number, since it is larger than the sum of its proper divisors (10110794).

18902542 is a wasteful number, since it uses less digits than its factorization.

18902542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219842.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18902542 is about 4347.7053718025. The cubic root of 18902542 is about 266.3831420614.

The spelling of 18902542 in words is "eighteen million, nine hundred two thousand, five hundred forty-two".