19877743612 has 12 divisors (see below), whose sum is σ = 36832289760. Its totient is φ = 9354232256.

The previous prime is 19877743597. The next prime is 19877743619. The reversal of 19877743612 is 21634777891.

It is a super-2 number, since 2×19877743612² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19877743619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146159812 + ... + 146159947.

It is an arithmetic number, because the mean of its divisors is an integer number (3069357480).

Almost surely, 2^19877743612 is an apocalyptic number.

It is an amenable number.

19877743612 is a deficient number, since it is larger than the sum of its proper divisors (16954546148).

19877743612 is a wasteful number, since it uses less digits than its factorization.

19877743612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292319780 (or 292319778 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The spelling of 19877743612 in words is "nineteen billion, eight hundred seventy-seven million, seven hundred forty-three thousand, six hundred twelve".