19949510028 has 96 divisors (see below), whose sum is σ = 56916912640. Its totient is φ = 5311319040.

The previous prime is 19949509991. The next prime is 19949510059. The reversal of 19949510028 is 82001594991.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5101 + ... + 199812.

Almost surely, 2^19949510028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19949510028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28458456320).

19949510028 is an abundant number, since it is smaller than the sum of its proper divisors (36967402612).

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

19949510028 is a wasteful number, since it uses less digits than its factorization.

19949510028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205007 (or 205005 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 19949510028 in words is "nineteen billion, nine hundred forty-nine million, five hundred ten thousand, twenty-eight".