21320212319 has 16 divisors (see below), whose sum is σ = 25773652992. Its totient is φ = 17240465088.

The previous prime is 21320212307. The next prime is 21320212327. The reversal of 21320212319 is 91321202312.

It is not a de Polignac number, because 21320212319 - 2⁸ = 21320212063 is a prime.

It is a super-2 number, since 2×21320212319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320212369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895259 + ... + 918764.

It is an arithmetic number, because the mean of its divisors is an integer number (1610853312).

Almost surely, 2^21320212319 is an apocalyptic number.

21320212319 is a deficient number, since it is larger than the sum of its proper divisors (4453440673).

21320212319 is a wasteful number, since it uses less digits than its factorization.

21320212319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814126.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 21320212319 in words is "twenty-one billion, three hundred twenty million, two hundred twelve thousand, three hundred nineteen".