18807849 has 16 divisors (see below), whose sum is σ = 28458240. Its totient is φ = 12270960.

The previous prime is 18807847. The next prime is 18807871. The reversal of 18807849 is 94870881.

It is not a de Polignac number, because 18807849 - 2¹ = 18807847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18807847) 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, 6142 + ... + 8679.

It is an arithmetic number, because the mean of its divisors is an integer number (1778640).

Almost surely, 2^18807849 is an apocalyptic number.

It is an amenable number.

18807849 is a deficient number, since it is larger than the sum of its proper divisors (9650391).

18807849 is a wasteful number, since it uses less digits than its factorization.

18807849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14877 (or 14871 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 18807849 is about 4336.8017017152. The cubic root of 18807849 is about 265.9375783956.

The spelling of 18807849 in words is "eighteen million, eight hundred seven thousand, eight hundred forty-nine".