18942605 has 16 divisors (see below), whose sum is σ = 24905664. Its totient is φ = 13716480.

The previous prime is 18942589. The next prime is 18942617. The reversal of 18942605 is 50624981.

It is not a de Polignac number, because 18942605 - 2⁴ = 18942589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14957 + ... + 16173.

It is an arithmetic number, because the mean of its divisors is an integer number (1556604).

Almost surely, 2^18942605 is an apocalyptic number.

It is an amenable number.

18942605 is a deficient number, since it is larger than the sum of its proper divisors (5963059).

18942605 is a wasteful number, since it uses less digits than its factorization.

18942605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 18942605 is about 4352.3103060329. The cubic root of 18942605 is about 266.5712045455.

The spelling of 18942605 in words is "eighteen million, nine hundred forty-two thousand, six hundred five".