18645706 has 8 divisors (see below), whose sum is σ = 28724580. Its totient is φ = 9070848.

The previous prime is 18645691. The next prime is 18645721. The reversal of 18645706 is 60754681.

It is an interprime number because it is at equal distance from previous prime (18645691) and next prime (18645721).

It can be written as a sum of positive squares in 2 ways, for example, as 18020025 + 625681 = 4245^2 + 791^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125911 + ... + 126058.

Almost surely, 2^18645706 is an apocalyptic number.

18645706 is a deficient number, since it is larger than the sum of its proper divisors (10078874).

18645706 is a wasteful number, since it uses less digits than its factorization.

18645706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252008.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 18645706 is about 4318.0673917854. The cubic root of 18645706 is about 265.1711532299.

The spelling of 18645706 in words is "eighteen million, six hundred forty-five thousand, seven hundred six".