19625628428 has 96 divisors (see below), whose sum is σ = 43456573440. Its totient is φ = 7565425920.

The previous prime is 19625628419. The next prime is 19625628479. The reversal of 19625628428 is 82482652691.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 19625628428.

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, 862850 + ... + 885302.

It is an arithmetic number, because the mean of its divisors is an integer number (452672640).

Almost surely, 2^19625628428 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 19625628428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21728286720).

19625628428 is an abundant number, since it is smaller than the sum of its proper divisors (23830945012).

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

19625628428 is a wasteful number, since it uses less digits than its factorization.

19625628428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22567 (or 22565 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The spelling of 19625628428 in words is "nineteen billion, six hundred twenty-five million, six hundred twenty-eight thousand, four hundred twenty-eight".