19828057813 has 8 divisors (see below), whose sum is σ = 19992644568. Its totient is φ = 19663759104.

The previous prime is 19828057801. The next prime is 19828057853. The reversal of 19828057813 is 31875082891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1521156004 + 18306901809 = 39002^2 + 135303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19828057813 - 2²⁵ = 19794503381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19828057853) 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, 67345 + ... + 210217.

It is an arithmetic number, because the mean of its divisors is an integer number (2499080571).

Almost surely, 2^19828057813 is an apocalyptic number.

It is an amenable number.

19828057813 is a deficient number, since it is larger than the sum of its proper divisors (164586755).

19828057813 is a wasteful number, since it uses less digits than its factorization.

19828057813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144023.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 19828057813 in words is "nineteen billion, eight hundred twenty-eight million, fifty-seven thousand, eight hundred thirteen".