19609430940 has 240 divisors, whose sum is σ = 68923872864. Its totient is φ = 4625164800.

The previous prime is 19609430933. The next prime is 19609430957. The reversal of 19609430940 is 4903490691.

19609430940 is a `hidden beast` number, since 1 + 9 + 609 + 4 + 30 + 9 + 4 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 644470 + ... + 674210.

Almost surely, 2^19609430940 is an apocalyptic number.

19609430940 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 19609430940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34461936432).

19609430940 is an abundant number, since it is smaller than the sum of its proper divisors (49314441924).

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

19609430940 is a wasteful number, since it uses less digits than its factorization.

19609430940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29810 (or 29799 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 19609430940 in words is "nineteen billion, six hundred nine million, four hundred thirty thousand, nine hundred forty".