20519928 has 96 divisors (see below), whose sum is σ = 65323440. Its totient is φ = 5736960.

The previous prime is 20519927. The next prime is 20519951. The reversal of 20519928 is 82991502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20519892 and 20519901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9300 + ... + 11292.

Almost surely, 2^20519928 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 20519928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32661720).

20519928 is an abundant number, since it is smaller than the sum of its proper divisors (44803512).

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

20519928 is a wasteful number, since it uses less digits than its factorization.

20519928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 20519928 is about 4529.8927139613. The cubic root of 20519928 is about 273.7738379191.

The spelling of 20519928 in words is "twenty million, five hundred nineteen thousand, nine hundred twenty-eight".