19972535572 has 24 divisors (see below), whose sum is σ = 38151358560. Its totient is φ = 9073193760.

The previous prime is 19972535551. The next prime is 19972535579. The reversal of 19972535572 is 27553527991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972535579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53047 + ... + 206782.

It is an arithmetic number, because the mean of its divisors is an integer number (1589639940).

Almost surely, 2^19972535572 is an apocalyptic number.

It is an amenable number.

19972535572 is a deficient number, since it is larger than the sum of its proper divisors (18178822988).

19972535572 is a wasteful number, since it uses less digits than its factorization.

19972535572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261591 (or 261589 counting only the distinct ones).

The product of its digits is 5953500, while the sum is 55.

The spelling of 19972535572 in words is "nineteen billion, nine hundred seventy-two million, five hundred thirty-five thousand, five hundred seventy-two".