19955430012 has 48 divisors (see below), whose sum is σ = 53263411712. Its totient is φ = 5696308800.

The previous prime is 19955430007. The next prime is 19955430043. The reversal of 19955430012 is 21003455991.

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, 16864 + ... + 200487.

Almost surely, 2^19955430012 is an apocalyptic number.

19955430012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19955430012 is an abundant number, since it is smaller than the sum of its proper divisors (33307981700).

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

19955430012 is a wasteful number, since it uses less digits than its factorization.

19955430012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218458 (or 218456 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 19955430012 in words is "nineteen billion, nine hundred fifty-five million, four hundred thirty thousand, twelve".