17964221252 has 6 divisors (see below), whose sum is σ = 31437387198. Its totient is φ = 8982110624.

The previous prime is 17964221243. The next prime is 17964221257. The reversal of 17964221252 is 25212246971.

It can be written as a sum of positive squares in only one way, i.e., 14584426756 + 3379794496 = 120766^2 + 58136^2 .

It is not an unprimeable number, because it can be changed into a prime (17964221257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245527653 + ... + 2245527660.

It is an arithmetic number, because the mean of its divisors is an integer number (5239564533).

Almost surely, 2^17964221252 is an apocalyptic number.

It is an amenable number.

17964221252 is a deficient number, since it is larger than the sum of its proper divisors (13473165946).

17964221252 is a wasteful number, since it uses less digits than its factorization.

17964221252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491055317 (or 4491055315 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The spelling of 17964221252 in words is "seventeen billion, nine hundred sixty-four million, two hundred twenty-one thousand, two hundred fifty-two".