18971652 has 48 divisors (see below), whose sum is σ = 53258240. Its totient is φ = 5134752.

The previous prime is 18971647. The next prime is 18971657. The reversal of 18971652 is 25617981.

It is an interprime number because it is at equal distance from previous prime (18971647) and next prime (18971657).

It is a self number, because there is not a number n which added to its sum of digits gives 18971652.

It is not an unprimeable number, because it can be changed into a prime (18971657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4348 + ... + 7539.

Almost surely, 2^18971652 is an apocalyptic number.

18971652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18971652 is an abundant number, since it is smaller than the sum of its proper divisors (34286588).

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

18971652 is a wasteful number, since it uses less digits than its factorization.

18971652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11920 (or 11918 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 18971652 is about 4355.6459911246. The cubic root of 18971652 is about 266.7073903084.

The spelling of 18971652 in words is "eighteen million, nine hundred seventy-one thousand, six hundred fifty-two".