19712801240 has 32 divisors (see below), whose sum is σ = 48385967760. Its totient is φ = 7168291200.

The previous prime is 19712801239. The next prime is 19712801267. The reversal of 19712801240 is 4210821791.

It is a self number, because there is not a number n which added to its sum of digits gives 19712801240.

It is a congruent number.

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, 22400471 + ... + 22401350.

Almost surely, 2^19712801240 is an apocalyptic number.

19712801240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19712801240 is an abundant number, since it is smaller than the sum of its proper divisors (28673166520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19712801240 is a wasteful number, since it uses less digits than its factorization.

19712801240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44801843 (or 44801839 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 19712801240 in words is "nineteen billion, seven hundred twelve million, eight hundred one thousand, two hundred forty".