21464522213 has 4 divisors (see below), whose sum is σ = 21575737548. Its totient is φ = 21353306880.

The previous prime is 21464522207. The next prime is 21464522293. The reversal of 21464522213 is 31222546412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6954392449 + 14510129764 = 83393^2 + 120458^2 .

It is a cyclic number.

It is not a de Polignac number, because 21464522213 - 2⁸ = 21464521957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21464522213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464522203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55607378 + ... + 55607763.

It is an arithmetic number, because the mean of its divisors is an integer number (5393934387).

Almost surely, 2^21464522213 is an apocalyptic number.

It is an amenable number.

21464522213 is a deficient number, since it is larger than the sum of its proper divisors (111215335).

21464522213 is a wasteful number, since it uses less digits than its factorization.

21464522213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111215334.

The product of its digits is 23040, while the sum is 32.

The spelling of 21464522213 in words is "twenty-one billion, four hundred sixty-four million, five hundred twenty-two thousand, two hundred thirteen".