19903955480 has 32 divisors (see below), whose sum is σ = 46228544640. Its totient is φ = 7704756480.

The previous prime is 19903955473. The next prime is 19903955509. The reversal of 19903955480 is 8455930991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8024549 + ... + 8027028.

It is an arithmetic number, because the mean of its divisors is an integer number (1444642020).

Almost surely, 2^19903955480 is an apocalyptic number.

19903955480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19903955480 is an abundant number, since it is smaller than the sum of its proper divisors (26324589160).

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

19903955480 is a wasteful number, since it uses less digits than its factorization.

19903955480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051619 (or 16051615 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 19903955480 in words is "nineteen billion, nine hundred three million, nine hundred fifty-five thousand, four hundred eighty".