19902240330 has 96 divisors (see below), whose sum is σ = 55697518080. Its totient is φ = 4538136960.

The previous prime is 19902240277. The next prime is 19902240359. The reversal of 19902240330 is 3304220991.

It is a junction number, because it is equal to n+sod(n) for n = 19902240291 and 19902240300.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 602791 + ... + 634949.

It is an arithmetic number, because the mean of its divisors is an integer number (580182480).

Almost surely, 2^19902240330 is an apocalyptic number.

19902240330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19902240330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27848759040).

19902240330 is an abundant number, since it is smaller than the sum of its proper divisors (35795277750).

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

19902240330 is a wasteful number, since it uses less digits than its factorization.

19902240330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32604 (or 32597 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The spelling of 19902240330 in words is "nineteen billion, nine hundred two million, two hundred forty thousand, three hundred thirty".