19408155492 has 192 divisors, whose sum is σ = 54602956800. Its totient is φ = 5299344000.

The previous prime is 19408155467. The next prime is 19408155493. The reversal of 19408155492 is 29455180491.

It is not an unprimeable number, because it can be changed into a prime (19408155493) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4585017 + ... + 4589247.

It is an arithmetic number, because the mean of its divisors is an integer number (284390400).

Almost surely, 2^19408155492 is an apocalyptic number.

19408155492 is a gapful number since it is divisible by the number (12) 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 19408155492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27301478400).

19408155492 is an abundant number, since it is smaller than the sum of its proper divisors (35194801308).

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

19408155492 is a wasteful number, since it uses less digits than its factorization.

19408155492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 19408155492 in words is "nineteen billion, four hundred eight million, one hundred fifty-five thousand, four hundred ninety-two".