19690993152 has 120 divisors (see below), whose sum is σ = 56886738480. Its totient is φ = 6557061120.

The previous prime is 19690993109. The next prime is 19690993181. The reversal of 19690993152 is 25139909691.

It is a super-2 number, since 2×19690993152² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7182502 + ... + 7185242.

It is an arithmetic number, because the mean of its divisors is an integer number (474056154).

Almost surely, 2^19690993152 is an apocalyptic number.

19690993152 is a gapful number since it is divisible by the number (12) 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 19690993152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28443369240).

19690993152 is an abundant number, since it is smaller than the sum of its proper divisors (37195745328).

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

19690993152 is a wasteful number, since it uses less digits than its factorization.

19690993152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324 (or 4305 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The spelling of 19690993152 in words is "nineteen billion, six hundred ninety million, nine hundred ninety-three thousand, one hundred fifty-two".