19609240920 has 128 divisors (see below), whose sum is σ = 62342447040. Its totient is φ = 4917248000.

The previous prime is 19609240913. The next prime is 19609240921. The reversal of 19609240920 is 2904290691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19609240921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2797420 + ... + 2804420.

Almost surely, 2^19609240920 is an apocalyptic number.

19609240920 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 19609240920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31171223520).

19609240920 is an abundant number, since it is smaller than the sum of its proper divisors (42733206120).

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

19609240920 is a wasteful number, since it uses less digits than its factorization.

19609240920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8405 (or 8401 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 19609240920 in words is "nineteen billion, six hundred nine million, two hundred forty thousand, nine hundred twenty".