18951039 has 12 divisors (see below), whose sum is σ = 28984176. Its totient is φ = 11890752.

The previous prime is 18951029. The next prime is 18951043. The reversal of 18951039 is 93015981.

It is a happy number.

It is not a de Polignac number, because 18951039 - 2⁸ = 18950783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18950994 and 18951012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18951029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61779 + ... + 62084.

It is an arithmetic number, because the mean of its divisors is an integer number (2415348).

Almost surely, 2^18951039 is an apocalyptic number.

18951039 is a deficient number, since it is larger than the sum of its proper divisors (10033137).

18951039 is a wasteful number, since it uses less digits than its factorization.

18951039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123886 (or 123883 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 18951039 is about 4353.2791089017. The cubic root of 18951039 is about 266.6107613708.

The spelling of 18951039 in words is "eighteen million, nine hundred fifty-one thousand, thirty-nine".