18949761 has 16 divisors (see below), whose sum is σ = 28326720. Its totient is φ = 12519360.

The previous prime is 18949757. The next prime is 18949771. The reversal of 18949761 is 16794981.

It is a happy number.

It is not a de Polignac number, because 18949761 - 2² = 18949757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18949741) 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, 55 + ... + 6156.

It is an arithmetic number, because the mean of its divisors is an integer number (1770420).

Almost surely, 2^18949761 is an apocalyptic number.

It is an amenable number.

18949761 is a deficient number, since it is larger than the sum of its proper divisors (9376959).

18949761 is a wasteful number, since it uses less digits than its factorization.

18949761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333 (or 6327 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 18949761 is about 4353.1323205251. The cubic root of 18949761 is about 266.6047680985.

The spelling of 18949761 in words is "eighteen million, nine hundred forty-nine thousand, seven hundred sixty-one".