19661093252 has 24 divisors (see below), whose sum is σ = 34743292416. Its totient is φ = 9734875488.

The previous prime is 19661093237. The next prime is 19661093269. The reversal of 19661093252 is 25239016691.

It is a super-3 number, since 3×19661093252³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126173 + ... + 235035.

It is an arithmetic number, because the mean of its divisors is an integer number (1447637184).

Almost surely, 2^19661093252 is an apocalyptic number.

It is an amenable number.

19661093252 is a deficient number, since it is larger than the sum of its proper divisors (15082199164).

19661093252 is a wasteful number, since it uses less digits than its factorization.

19661093252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109307 (or 109305 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 19661093252 in words is "nineteen billion, six hundred sixty-one million, ninety-three thousand, two hundred fifty-two".