19702223940 has 96 divisors (see below), whose sum is σ = 63330140160. Its totient is φ = 4483149696.

The previous prime is 19702223909. The next prime is 19702223987. The reversal of 19702223940 is 4932220791.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11520 + ... + 198839.

It is an arithmetic number, because the mean of its divisors is an integer number (659688960).

Almost surely, 2^19702223940 is an apocalyptic number.

19702223940 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 19702223940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31665070080).

19702223940 is an abundant number, since it is smaller than the sum of its proper divisors (43627916220).

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

19702223940 is a wasteful number, since it uses less digits than its factorization.

19702223940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210601 (or 210599 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 19702223940 in words is "nineteen billion, seven hundred two million, two hundred twenty-three thousand, nine hundred forty".