19620073928 has 144 divisors (see below), whose sum is σ = 46985187780. Its totient is φ = 7653574656.

The previous prime is 19620073897. The next prime is 19620073931. The reversal of 19620073928 is 82937002691.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3485485444 + 16134588484 = 59038^2 + 127022^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4834076 + ... + 4838132.

Almost surely, 2^19620073928 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 19620073928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23492593890).

19620073928 is an abundant number, since it is smaller than the sum of its proper divisors (27365113852).

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

19620073928 is a wasteful number, since it uses less digits than its factorization.

19620073928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176 (or 4152 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 19620073928 in words is "nineteen billion, six hundred twenty million, seventy-three thousand, nine hundred twenty-eight".