19839059828 has 36 divisors (see below), whose sum is σ = 41371714692. Its totient is φ = 8295073920.

The previous prime is 19839059827. The next prime is 19839059843. The reversal of 19839059828 is 82895093891.

It can be written as a sum of positive squares in 2 ways, for example, as 6330111844 + 13508947984 = 79562^2 + 116228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19839059827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1226351 + ... + 1242422.

It is an arithmetic number, because the mean of its divisors is an integer number (1149214297).

Almost surely, 2^19839059828 is an apocalyptic number.

It is an amenable number.

19839059828 is an abundant number, since it is smaller than the sum of its proper divisors (21532654864).

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

19839059828 is a wasteful number, since it uses less digits than its factorization.

19839059828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468832 (or 2468823 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 19839059828 in words is "nineteen billion, eight hundred thirty-nine million, fifty-nine thousand, eight hundred twenty-eight".