18995373 has 12 divisors (see below), whose sum is σ = 27710748. Its totient is φ = 12537600.

The previous prime is 18995369. The next prime is 18995381. The reversal of 18995373 is 37359981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15468489 + 3526884 = 3933^2 + 1878^2 .

It is not a de Polignac number, because 18995373 - 2² = 18995369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18995303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9540 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (2309229).

Almost surely, 2^18995373 is an apocalyptic number.

It is an amenable number.

18995373 is a deficient number, since it is larger than the sum of its proper divisors (8715375).

18995373 is a wasteful number, since it uses less digits than its factorization.

18995373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21004 (or 21001 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 18995373 is about 4358.3681579233. The cubic root of 18995373 is about 266.8185022462.

The spelling of 18995373 in words is "eighteen million, nine hundred ninety-five thousand, three hundred seventy-three".