19247693540 has 96 divisors (see below), whose sum is σ = 43738168320. Its totient is φ = 7099545600.

The previous prime is 19247693489. The next prime is 19247693579. The reversal of 19247693540 is 4539674291.

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, 1084256 + ... + 1101864.

It is an arithmetic number, because the mean of its divisors is an integer number (455605920).

Almost surely, 2^19247693540 is an apocalyptic number.

19247693540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19247693540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21869084160).

19247693540 is an abundant number, since it is smaller than the sum of its proper divisors (24490474780).

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

19247693540 is a wasteful number, since it uses less digits than its factorization.

19247693540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17733 (or 17731 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 19247693540 in words is "nineteen billion, two hundred forty-seven million, six hundred ninety-three thousand, five hundred forty".