21365072227293 has 16 divisors (see below), whose sum is σ = 30004842909120. Its totient is φ = 13485280346496.

The previous prime is 21365072227249. The next prime is 21365072227319. The reversal of 21365072227293 is 39272227056312.

It is not a de Polignac number, because 21365072227293 - 2³⁴ = 21347892358109 is a prime.

It is a super-2 number, since 2×21365072227293² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365072207293) 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, 117262080 + ... + 117444137.

It is an arithmetic number, because the mean of its divisors is an integer number (1875302681820).

Almost surely, 2^{21365072227293} is an apocalyptic number.

It is an amenable number.

21365072227293 is a deficient number, since it is larger than the sum of its proper divisors (8639770681827).

21365072227293 is a wasteful number, since it uses less digits than its factorization.

21365072227293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234707836.

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 21365072227293 in words is "twenty-one trillion, three hundred sixty-five billion, seventy-two million, two hundred twenty-seven thousand, two hundred ninety-three".