19692097920 has 512 divisors, whose sum is σ = 77082624000. Its totient is φ = 4770109440.

The previous prime is 19692097879. The next prime is 19692097921. The reversal of 19692097920 is 2979029691.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19692097921) 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, 15395841 + ... + 15397119.

It is an arithmetic number, because the mean of its divisors is an integer number (150552000).

Almost surely, 2^19692097920 is an apocalyptic number.

19692097920 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 19692097920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38541312000).

19692097920 is an abundant number, since it is smaller than the sum of its proper divisors (57390526080).

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

19692097920 is an equidigital number, since it uses as much as digits as its factorization.

19692097920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 19692097920 in words is "nineteen billion, six hundred ninety-two million, ninety-seven thousand, nine hundred twenty".