19747925572 has 12 divisors (see below), whose sum is σ = 34570255356. Its totient is φ = 9870709760.

The previous prime is 19747925437. The next prime is 19747925581. The reversal of 19747925572 is 27552974791.

It can be written as a sum of positive squares in 2 ways, for example, as 15766820356 + 3981105216 = 125566^2 + 63096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799573 + ... + 823900.

It is an arithmetic number, because the mean of its divisors is an integer number (2880854613).

Almost surely, 2^19747925572 is an apocalyptic number.

It is an amenable number.

19747925572 is a deficient number, since it is larger than the sum of its proper divisors (14822329784).

19747925572 is a wasteful number, since it uses less digits than its factorization.

19747925572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626518 (or 1626516 counting only the distinct ones).

The product of its digits is 11113200, while the sum is 58.

The spelling of 19747925572 in words is "nineteen billion, seven hundred forty-seven million, nine hundred twenty-five thousand, five hundred seventy-two".