19903069536 has 48 divisors (see below), whose sum is σ = 59709210624. Its totient is φ = 5686591104.

The previous prime is 19903069493. The next prime is 19903069553. The reversal of 19903069536 is 63596030991.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×19903069536² (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 7 ways as a sum of consecutive naturals, for example, 14808160 + ... + 14809503.

It is an arithmetic number, because the mean of its divisors is an integer number (1243941888).

Almost surely, 2^19903069536 is an apocalyptic number.

19903069536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19903069536 is an abundant number, since it is smaller than the sum of its proper divisors (39806141088).

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

19903069536 is a wasteful number, since it uses less digits than its factorization.

19903069536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29617683 (or 29617675 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 51.

The spelling of 19903069536 in words is "nineteen billion, nine hundred three million, sixty-nine thousand, five hundred thirty-six".