22987018 has 4 divisors (see below), whose sum is σ = 34480530. Its totient is φ = 11493508.

The previous prime is 22986991. The next prime is 22987037. The reversal of 22987018 is 81078922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 5822569 = 4143^2 + 2413^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5746753 + ... + 5746756.

Almost surely, 2^22987018 is an apocalyptic number.

22987018 is a deficient number, since it is larger than the sum of its proper divisors (11493512).

22987018 is a wasteful number, since it uses less digits than its factorization.

22987018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493511.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22987018 is about 4794.4778652112. The cubic root of 22987018 is about 284.3331820004. Note that the first 3 decimals are identical.

It can be divided in two parts, 2298 and 7018, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 22987018 in words is "twenty-two million, nine hundred eighty-seven thousand, eighteen".