18042951 has 16 divisors (see below), whose sum is σ = 25424000. Its totient is φ = 11350368.

The previous prime is 18042923. The next prime is 18042979. The reversal of 18042951 is 15924081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18042923) and next prime (18042979).

It is not a de Polignac number, because 18042951 - 2⁶ = 18042887 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 (18042251) 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, 19440 + ... + 20346.

It is an arithmetic number, because the mean of its divisors is an integer number (1589000).

Almost surely, 2^18042951 is an apocalyptic number.

18042951 is a deficient number, since it is larger than the sum of its proper divisors (7381049).

18042951 is a wasteful number, since it uses less digits than its factorization.

18042951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18042951 is about 4247.6994950208. The cubic root of 18042951 is about 262.2824246994.

The spelling of 18042951 in words is "eighteen million, forty-two thousand, nine hundred fifty-one".