18392949 has 12 divisors (see below), whose sum is σ = 27186016. Its totient is φ = 11976552.

The previous prime is 18392947. The next prime is 18392981. The reversal of 18392949 is 94929381.

It is not a de Polignac number, because 18392949 - 2¹ = 18392947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18392947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23377 + ... + 24150.

Almost surely, 2^18392949 is an apocalyptic number.

It is an amenable number.

18392949 is a deficient number, since it is larger than the sum of its proper divisors (8793067).

18392949 is a wasteful number, since it uses less digits than its factorization.

18392949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47576 (or 47573 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 18392949 is about 4288.7001527269. The cubic root of 18392949 is about 263.9674977204.

The spelling of 18392949 in words is "eighteen million, three hundred ninety-two thousand, nine hundred forty-nine".