19342469840 has 120 divisors (see below), whose sum is σ = 47557518624. Its totient is φ = 7312032000.

The previous prime is 19342469821. The next prime is 19342469879. The reversal of 19342469840 is 4896424391.

It is a super-2 number, since 2×19342469840² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3302915 + ... + 3308765.

Almost surely, 2^19342469840 is an apocalyptic number.

19342469840 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 19342469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23778759312).

19342469840 is an abundant number, since it is smaller than the sum of its proper divisors (28215048784).

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

19342469840 is a wasteful number, since it uses less digits than its factorization.

19342469840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969 (or 5932 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 19342469840 in words is "nineteen billion, three hundred forty-two million, four hundred sixty-nine thousand, eight hundred forty".