21849552519 has 8 divisors (see below), whose sum is σ = 29141890560. Its totient is φ = 14561791416.

The previous prime is 21849552511. The next prime is 21849552589. The reversal of 21849552519 is 91525594812.

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

It is not a de Polignac number, because 21849552519 - 2³ = 21849552511 is a prime.

It is a super-2 number, since 2×21849552519² (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 (21849552511) 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, 1133079 + ... + 1152200.

It is an arithmetic number, because the mean of its divisors is an integer number (3642736320).

Almost surely, 2^21849552519 is an apocalyptic number.

21849552519 is a deficient number, since it is larger than the sum of its proper divisors (7292338041).

21849552519 is a wasteful number, since it uses less digits than its factorization.

21849552519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288469.

The product of its digits is 1296000, while the sum is 51.

The spelling of 21849552519 in words is "twenty-one billion, eight hundred forty-nine million, five hundred fifty-two thousand, five hundred nineteen".