18949073 has 8 divisors (see below), whose sum is σ = 22262016. Its totient is φ = 15901200.

The previous prime is 18949057. The next prime is 18949081. The reversal of 18949073 is 37094981.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18949073 - 2⁴ = 18949057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18949073.

It is not an unprimeable number, because it can be changed into a prime (18949003) 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, 66113 + ... + 66398.

It is an arithmetic number, because the mean of its divisors is an integer number (2782752).

Almost surely, 2^18949073 is an apocalyptic number.

18949073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18949073 is a deficient number, since it is larger than the sum of its proper divisors (3312943).

18949073 is a wasteful number, since it uses less digits than its factorization.

18949073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132535.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 18949073 is about 4353.0532962508. The cubic root of 18949073 is about 266.6015415618.

The spelling of 18949073 in words is "eighteen million, nine hundred forty-nine thousand, seventy-three".