19917031332 has 192 divisors, whose sum is σ = 55233239040. Its totient is φ = 5524147200.

The previous prime is 19917031331. The next prime is 19917031349. The reversal of 19917031332 is 23313071991.

It is not an unprimeable number, because it can be changed into a prime (19917031331) 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, 6595719 + ... + 6598737.

It is an arithmetic number, because the mean of its divisors is an integer number (287673120).

Almost surely, 2^19917031332 is an apocalyptic number.

19917031332 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 19917031332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27616619520).

19917031332 is an abundant number, since it is smaller than the sum of its proper divisors (35316207708).

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

19917031332 is a wasteful number, since it uses less digits than its factorization.

19917031332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 39.

The spelling of 19917031332 in words is "nineteen billion, nine hundred seventeen million, thirty-one thousand, three hundred thirty-two".