18949534 has 8 divisors (see below), whose sum is σ = 28474488. Its totient is φ = 9458040.

The previous prime is 18949531. The next prime is 18949537. The reversal of 18949534 is 43594981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18949531) and next prime (18949537).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949531) 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 3 ways as a sum of consecutive naturals, for example, 6897 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (3559311).

Almost surely, 2^18949534 is an apocalyptic number.

18949534 is a deficient number, since it is larger than the sum of its proper divisors (9524954).

18949534 is a wasteful number, since it uses less digits than its factorization.

18949534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16730.

The product of its digits is 155520, while the sum is 43.

The square root of 18949534 is about 4353.1062472676. The cubic root of 18949534 is about 266.6037035376.

The spelling of 18949534 in words is "eighteen million, nine hundred forty-nine thousand, five hundred thirty-four".