21839005719 has 6 divisors (see below), whose sum is σ = 31545230496. Its totient is φ = 14559337140.

The previous prime is 21839005717. The next prime is 21839005729. The reversal of 21839005719 is 91750093812.

It is not a de Polignac number, because 21839005719 - 2¹ = 21839005717 is a prime.

It is a super-2 number, since 2×21839005719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21839005717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1213278087 + ... + 1213278104.

It is an arithmetic number, because the mean of its divisors is an integer number (5257538416).

Almost surely, 2^21839005719 is an apocalyptic number.

21839005719 is a deficient number, since it is larger than the sum of its proper divisors (9706224777).

21839005719 is a wasteful number, since it uses less digits than its factorization.

21839005719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426556197 (or 2426556194 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 21839005719 in words is "twenty-one billion, eight hundred thirty-nine million, five thousand, seven hundred nineteen".