19690131825 has 432 divisors, whose sum is σ = 46926996480. Its totient is φ = 7812080640.

The previous prime is 19690131817. The next prime is 19690131829. The reversal of 19690131825 is 52813109691.

It is not a de Polignac number, because 19690131825 - 2³ = 19690131817 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19690131829) by changing a digit.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 249242136 + ... + 249242214.

Almost surely, 2^19690131825 is an apocalyptic number.

19690131825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19690131825 is an abundant number, since it is smaller than the sum of its proper divisors (27236864655).

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

19690131825 is a wasteful number, since it uses less digits than its factorization.

19690131825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 19690131825 in words is "nineteen billion, six hundred ninety million, one hundred thirty-one thousand, eight hundred twenty-five".