18951849 has 12 divisors (see below), whose sum is σ = 31285696. Its totient is φ = 10829592.

The previous prime is 18951827. The next prime is 18951851. The reversal of 18951849 is 94815981.

It is not a de Polignac number, because 18951849 - 2²¹ = 16854697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18951649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150349 + ... + 150474.

Almost surely, 2^18951849 is an apocalyptic number.

It is an amenable number.

18951849 is a deficient number, since it is larger than the sum of its proper divisors (12333847).

18951849 is a wasteful number, since it uses less digits than its factorization.

18951849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300836 (or 300833 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 18951849 is about 4353.3721412257. The cubic root of 18951849 is about 266.6145597842.

The spelling of 18951849 in words is "eighteen million, nine hundred fifty-one thousand, eight hundred forty-nine".