18630739 has 8 divisors (see below), whose sum is σ = 19143872. Its totient is φ = 18121320.

The previous prime is 18630727. The next prime is 18630751. The reversal of 18630739 is 93703681.

It is an interprime number because it is at equal distance from previous prime (18630727) and next prime (18630751).

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

It is a cyclic number.

It is not a de Polignac number, because 18630739 - 2²³ = 10242131 is a prime.

It is a super-2 number, since 2×18630739² = 694208871372242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18630698 and 18630707.

It is not an unprimeable number, because it can be changed into a prime (18630709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11404 + ... + 12934.

It is an arithmetic number, because the mean of its divisors is an integer number (2392984).

Almost surely, 2^18630739 is an apocalyptic number.

18630739 is a deficient number, since it is larger than the sum of its proper divisors (513133).

18630739 is a wasteful number, since it uses less digits than its factorization.

18630739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 18630739 is about 4316.3339768836. Note that the first 3 decimals coincide. The cubic root of 18630739 is about 265.1001828404.

The spelling of 18630739 in words is "eighteen million, six hundred thirty thousand, seven hundred thirty-nine".