19495970442 has 96 divisors (see below), whose sum is σ = 46058830272. Its totient is φ = 5924109312.

The previous prime is 19495970387. The next prime is 19495970467. The reversal of 19495970442 is 24407959491.

19495970442 is a `hidden beast` number, since 1 + 9 + 4 + 9 + 597 + 0 + 4 + 42 = 666.

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, 20586613 + ... + 20587559.

It is an arithmetic number, because the mean of its divisors is an integer number (479779482).

Almost surely, 2^19495970442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19495970442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23029415136).

19495970442 is an abundant number, since it is smaller than the sum of its proper divisors (26562859830).

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

19495970442 is a wasteful number, since it uses less digits than its factorization.

19495970442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 19495970442 in words is "nineteen billion, four hundred ninety-five million, nine hundred seventy thousand, four hundred forty-two".