18630722 has 8 divisors (see below), whose sum is σ = 30486672. Its totient is φ = 8468500.

The previous prime is 18630709. The next prime is 18630727. The reversal of 18630722 is 22703681.

It is a happy number.

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

It is a super-3 number, since 3×18630722³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18630727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423404 + ... + 423447.

It is an arithmetic number, because the mean of its divisors is an integer number (3810834).

Almost surely, 2^18630722 is an apocalyptic number.

18630722 is a deficient number, since it is larger than the sum of its proper divisors (11855950).

18630722 is a wasteful number, since it uses less digits than its factorization.

18630722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846864.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18630722 is about 4316.3320076194. The cubic root of 18630722 is about 265.1001022083.

The spelling of 18630722 in words is "eighteen million, six hundred thirty thousand, seven hundred twenty-two".