19695423936 has 112 divisors (see below), whose sum is σ = 53861980160. Its totient is φ = 6345077760.

The previous prime is 19695423929. The next prime is 19695423977. The reversal of 19695423936 is 63932459691.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5932485 + ... + 5935803.

Almost surely, 2^19695423936 is an apocalyptic number.

19695423936 is a gapful number since it is divisible by the number (16) 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 19695423936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26930990080).

19695423936 is an abundant number, since it is smaller than the sum of its proper divisors (34166556224).

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

19695423936 is a wasteful number, since it uses less digits than its factorization.

19695423936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362 (or 4352 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 57.

The spelling of 19695423936 in words is "nineteen billion, six hundred ninety-five million, four hundred twenty-three thousand, nine hundred thirty-six".