19712915040 has 192 divisors, whose sum is σ = 76425624576. Its totient is φ = 4159199232.

The previous prime is 19712915023. The next prime is 19712915051. The reversal of 19712915040 is 4051921791.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 19712915040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181972 + ... + 269331.

It is an arithmetic number, because the mean of its divisors is an integer number (398050128).

Almost surely, 2^19712915040 is an apocalyptic number.

19712915040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19712915040 is an abundant number, since it is smaller than the sum of its proper divisors (56712709536).

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

19712915040 is a wasteful number, since it uses less digits than its factorization.

19712915040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451341 (or 451333 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 19712915040 in words is "nineteen billion, seven hundred twelve million, nine hundred fifteen thousand, forty".