18769972 has 36 divisors (see below), whose sum is σ = 37607500. Its totient is φ = 8146944.

The previous prime is 18769969. The next prime is 18769991. The reversal of 18769972 is 27996781.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 55696 + 18714276 = 236^2 + 4326^2 .

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 14404 + ... + 15652.

Almost surely, 2^18769972 is an apocalyptic number.

It is an amenable number.

18769972 is an abundant number, since it is smaller than the sum of its proper divisors (18837528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18769972 is a wasteful number, since it uses less digits than its factorization.

18769972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1281 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 18769972 is about 4332.4325730472. The cubic root of 18769972 is about 265.7589351217.

The spelling of 18769972 in words is "eighteen million, seven hundred sixty-nine thousand, nine hundred seventy-two".