21234013049 has 8 divisors (see below), whose sum is σ = 21369221832. Its totient is φ = 21099064320.

The previous prime is 21234013033. The next prime is 21234013067. The reversal of 21234013049 is 94031043212.

It can be written as a sum of positive squares in 4 ways, for example, as 2508006400 + 18726006649 = 50080^2 + 136843^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21234013049 - 2⁴ = 21234013033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21234013069) 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 7 ways as a sum of consecutive naturals, for example, 100139 + ... + 229119.

It is an arithmetic number, because the mean of its divisors is an integer number (2671152729).

Almost surely, 2^21234013049 is an apocalyptic number.

It is an amenable number.

21234013049 is a deficient number, since it is larger than the sum of its proper divisors (135208783).

21234013049 is a wasteful number, since it uses less digits than its factorization.

21234013049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130027.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21234013049 in words is "twenty-one billion, two hundred thirty-four million, thirteen thousand, forty-nine".