19787211632 has 20 divisors (see below), whose sum is σ = 38639598336. Its totient is φ = 9815702400.

The previous prime is 19787211623. The next prime is 19787211637. The reversal of 19787211632 is 23611278791.

It is a super-2 number, since 2×19787211632² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19787211637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4866869 + ... + 4870932.

Almost surely, 2^19787211632 is an apocalyptic number.

It is an amenable number.

19787211632 is a deficient number, since it is larger than the sum of its proper divisors (18852386704).

19787211632 is a wasteful number, since it uses less digits than its factorization.

19787211632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9737936 (or 9737930 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The spelling of 19787211632 in words is "nineteen billion, seven hundred eighty-seven million, two hundred eleven thousand, six hundred thirty-two".