18649922 has 8 divisors (see below), whose sum is σ = 27994572. Its totient is φ = 9318400.

The previous prime is 18649921. The next prime is 18649927. The reversal of 18649922 is 22994681.

It can be written as a sum of positive squares in 2 ways, for example, as 18498601 + 151321 = 4301^2 + 389^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18649922.

It is not an unprimeable number, because it can be changed into a prime (18649921) 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, 1922 + ... + 6402.

Almost surely, 2^18649922 is an apocalyptic number.

18649922 is a deficient number, since it is larger than the sum of its proper divisors (9344650).

18649922 is a wasteful number, since it uses less digits than its factorization.

18649922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564.

The product of its digits is 62208, while the sum is 41.

The square root of 18649922 is about 4318.5555455499. Note that the first 4 decimals coincide. The cubic root of 18649922 is about 265.1911377656.

The spelling of 18649922 in words is "eighteen million, six hundred forty-nine thousand, nine hundred twenty-two".