18928994 has 12 divisors (see below), whose sum is σ = 33029334. Its totient is φ = 8112384.

The previous prime is 18928991. The next prime is 18929017. The reversal of 18928994 is 49982981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 3286969 = 3955^2 + 1813^2 .

It is not an unprimeable number, because it can be changed into a prime (18928991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 96479 + ... + 96674.

Almost surely, 2^18928994 is an apocalyptic number.

18928994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18928994 is a deficient number, since it is larger than the sum of its proper divisors (14100340).

18928994 is a wasteful number, since it uses less digits than its factorization.

18928994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193169 (or 193162 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 18928994 is about 4350.7463727503. The cubic root of 18928994 is about 266.5073419804.

The spelling of 18928994 in words is "eighteen million, nine hundred twenty-eight thousand, nine hundred ninety-four".