19244960640 has 128 divisors (see below), whose sum is σ = 68159296800. Its totient is φ = 5131984896.

The previous prime is 19244960639. The next prime is 19244960641. The reversal of 19244960640 is 4606944291.

19244960640 is a `hidden beast` number, since 1 + 92 + 449 + 60 + 64 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (19244960639) and next prime (19244960641).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19244960641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539577 + ... + 574136.

Almost surely, 2^19244960640 is an apocalyptic number.

19244960640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19244960640 is an abundant number, since it is smaller than the sum of its proper divisors (48914336160).

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

19244960640 is a wasteful number, since it uses less digits than its factorization.

19244960640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113741 (or 1113723 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 19244960640 in words is "nineteen billion, two hundred forty-four million, nine hundred sixty thousand, six hundred forty".