21022232293 has 4 divisors (see below), whose sum is σ = 21534969708. Its totient is φ = 20509494880.

The previous prime is 21022232279. The next prime is 21022232321. The reversal of 21022232293 is 39223222012.

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 1944545409 + 19077686884 = 44097^2 + 138122^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022232293 - 2²¹ = 21020135141 is a prime.

It is a super-3 number, since 3×21022232293³ (a number of 32 digits) contains 333 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 (21022232393) 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, 256368646 + ... + 256368727.

It is an arithmetic number, because the mean of its divisors is an integer number (5383742427).

Almost surely, 2^21022232293 is an apocalyptic number.

It is an amenable number.

21022232293 is a deficient number, since it is larger than the sum of its proper divisors (512737415).

21022232293 is an equidigital number, since it uses as much as digits as its factorization.

21022232293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512737414.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 21022232293 in words is "twenty-one billion, twenty-two million, two hundred thirty-two thousand, two hundred ninety-three".