19690693528 has 64 divisors (see below), whose sum is σ = 41702169600. Its totient is φ = 8634030720.

The previous prime is 19690693459. The next prime is 19690693543. The reversal of 19690693528 is 82539609691.

It is a super-2 number, since 2×19690693528² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

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, 3639001 + ... + 3644407.

It is an arithmetic number, because the mean of its divisors is an integer number (651596400).

Almost surely, 2^19690693528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19690693528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20851084800).

19690693528 is an abundant number, since it is smaller than the sum of its proper divisors (22011476072).

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

19690693528 is a wasteful number, since it uses less digits than its factorization.

19690693528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880 (or 6876 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 19690693528 in words is "nineteen billion, six hundred ninety million, six hundred ninety-three thousand, five hundred twenty-eight".