21734490213 has 32 divisors (see below), whose sum is σ = 32880816000. Its totient is φ = 14184188928.

The previous prime is 21734490199. The next prime is 21734490233. The reversal of 21734490213 is 31209443712.

It is a happy number.

21734490213 is a `hidden beast` number, since 2 + 17 + 344 + 90 + 213 = 666.

It is not a de Polignac number, because 21734490213 - 2⁵ = 21734490181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734490233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625606 + ... + 659432.

It is an arithmetic number, because the mean of its divisors is an integer number (1027525500).

Almost surely, 2^21734490213 is an apocalyptic number.

It is an amenable number.

21734490213 is a deficient number, since it is larger than the sum of its proper divisors (11146325787).

21734490213 is a wasteful number, since it uses less digits than its factorization.

21734490213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34338 (or 34332 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 21734490213 in words is "twenty-one billion, seven hundred thirty-four million, four hundred ninety thousand, two hundred thirteen".