19925635812 has 24 divisors (see below), whose sum is σ = 46511504256. Its totient is φ = 6639256608.

The previous prime is 19925635801. The next prime is 19925635841. The reversal of 19925635812 is 21853652991.

It is a happy number.

It is a super-3 number, since 3×19925635812³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295963 + ... + 356994.

It is an arithmetic number, because the mean of its divisors is an integer number (1937979344).

Almost surely, 2^19925635812 is an apocalyptic number.

19925635812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19925635812 is an abundant number, since it is smaller than the sum of its proper divisors (26585868444).

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

19925635812 is a wasteful number, since it uses less digits than its factorization.

19925635812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655507 (or 655505 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 51.

The spelling of 19925635812 in words is "nineteen billion, nine hundred twenty-five million, six hundred thirty-five thousand, eight hundred twelve".