20519333628 has 24 divisors (see below), whose sum is σ = 49422912000. Its totient is φ = 6619139760.

The previous prime is 20519333623. The next prime is 20519333647. The reversal of 20519333628 is 82633391502.

It is a self number, because there is not a number n which added to its sum of digits gives 20519333628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519333623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27579378 + ... + 27580121.

It is an arithmetic number, because the mean of its divisors is an integer number (2059288000).

Almost surely, 2^20519333628 is an apocalyptic number.

It is an amenable number.

20519333628 is an abundant number, since it is smaller than the sum of its proper divisors (28903578372).

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

20519333628 is a wasteful number, since it uses less digits than its factorization.

20519333628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55159537 (or 55159535 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 20519333628 in words is "twenty billion, five hundred nineteen million, three hundred thirty-three thousand, six hundred twenty-eight".