18942693 has 16 divisors (see below), whose sum is σ = 31489536. Its totient is φ = 9840240.

The previous prime is 18942691. The next prime is 18942733. The reversal of 18942693 is 39624981.

18942693 is nontrivially palindromic in base 13.

It is not a de Polignac number, because 18942693 - 2¹ = 18942691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942691) 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, 40771 + ... + 41232.

It is an arithmetic number, because the mean of its divisors is an integer number (1968096).

Almost surely, 2^18942693 is an apocalyptic number.

It is an amenable number.

18942693 is a deficient number, since it is larger than the sum of its proper divisors (12546843).

18942693 is a wasteful number, since it uses less digits than its factorization.

18942693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82024.

The product of its digits is 93312, while the sum is 42.

The square root of 18942693 is about 4352.3204155944. The cubic root of 18942693 is about 266.5716173404.

The spelling of 18942693 in words is "eighteen million, nine hundred forty-two thousand, six hundred ninety-three".