21924749049 has 16 divisors (see below), whose sum is σ = 33811663872. Its totient is φ = 12377482128.

The previous prime is 21924749029. The next prime is 21924749089. The reversal of 21924749049 is 94094742912.

It is not a de Polignac number, because 21924749049 - 2⁵ = 21924749017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21924748992 and 21924749010.

It is not an unprimeable number, because it can be changed into a prime (21924749009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6287629 + ... + 6291114.

It is an arithmetic number, because the mean of its divisors is an integer number (2113228992).

Almost surely, 2^21924749049 is an apocalyptic number.

It is an amenable number.

21924749049 is a deficient number, since it is larger than the sum of its proper divisors (11886914823).

21924749049 is a wasteful number, since it uses less digits than its factorization.

21924749049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12578836.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 21924749049 in words is "twenty-one billion, nine hundred twenty-four million, seven hundred forty-nine thousand, forty-nine".