21849748299 has 20 divisors (see below), whose sum is σ = 32776344480. Its totient is φ = 14505538320.

The previous prime is 21849748273. The next prime is 21849748309. The reversal of 21849748299 is 99284794812.

21849748299 is a `hidden beast` number, since 2 + 18 + 497 + 48 + 2 + 99 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21849748299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21849741299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 544972 + ... + 583689.

It is an arithmetic number, because the mean of its divisors is an integer number (1638817224).

Almost surely, 2^21849748299 is an apocalyptic number.

21849748299 is a deficient number, since it is larger than the sum of its proper divisors (10926596181).

21849748299 is a wasteful number, since it uses less digits than its factorization.

21849748299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128912 (or 1128903 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 21849748299 in words is "twenty-one billion, eight hundred forty-nine million, seven hundred forty-eight thousand, two hundred ninety-nine".