19884253939 has 16 divisors (see below), whose sum is σ = 22839252480. Its totient is φ = 17120950560.

The previous prime is 19884253933. The next prime is 19884253967. The reversal of 19884253939 is 93935248891.

It is a cyclic number.

It is not a de Polignac number, because 19884253939 - 2³ = 19884253931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19884253931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1070697 + ... + 1089109.

It is an arithmetic number, because the mean of its divisors is an integer number (1427453280).

Almost surely, 2^19884253939 is an apocalyptic number.

19884253939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19884253939 is a deficient number, since it is larger than the sum of its proper divisors (2954998541).

19884253939 is a wasteful number, since it uses less digits than its factorization.

19884253939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23610.

The product of its digits is 16796160, while the sum is 61.

The spelling of 19884253939 in words is "nineteen billion, eight hundred eighty-four million, two hundred fifty-three thousand, nine hundred thirty-nine".