18949371 has 8 divisors (see below), whose sum is σ = 28875264. Its totient is φ = 10828200.

The previous prime is 18949367. The next prime is 18949387. The reversal of 18949371 is 17394981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18949371 - 2² = 18949367 is a prime.

It is a super-2 number, since 2×18949371² = 718157322591282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18949321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451155 + ... + 451196.

It is an arithmetic number, because the mean of its divisors is an integer number (3609408).

Almost surely, 2^18949371 is an apocalyptic number.

18949371 is a deficient number, since it is larger than the sum of its proper divisors (9925893).

18949371 is an equidigital number, since it uses as much as digits as its factorization.

18949371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902361.

The product of its digits is 54432, while the sum is 42.

The square root of 18949371 is about 4353.0875249643. The cubic root of 18949371 is about 266.6029391120.

The spelling of 18949371 in words is "eighteen million, nine hundred forty-nine thousand, three hundred seventy-one".