21296493353 has 4 divisors (see below), whose sum is σ = 21297131520. Its totient is φ = 21295855188.

The previous prime is 21296493299. The next prime is 21296493371. The reversal of 21296493353 is 35339469212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21296493353 - 2⁶ = 21296493289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21296493298 and 21296493307.

It is not an unprimeable number, because it can be changed into a prime (21296493373) 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, 266093 + ... + 336746.

It is an arithmetic number, because the mean of its divisors is an integer number (5324282880).

Almost surely, 2^21296493353 is an apocalyptic number.

It is an amenable number.

21296493353 is a deficient number, since it is larger than the sum of its proper divisors (638167).

21296493353 is an equidigital number, since it uses as much as digits as its factorization.

21296493353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638166.

The product of its digits is 1049760, while the sum is 47.

The spelling of 21296493353 in words is "twenty-one billion, two hundred ninety-six million, four hundred ninety-three thousand, three hundred fifty-three".