21320213294 has 4 divisors (see below), whose sum is σ = 31980319944. Its totient is φ = 10660106646.

The previous prime is 21320213279. The next prime is 21320213311. The reversal of 21320213294 is 49231202312.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330053322 + ... + 5330053325.

It is an arithmetic number, because the mean of its divisors is an integer number (7995079986).

Almost surely, 2^21320213294 is an apocalyptic number.

21320213294 is a deficient number, since it is larger than the sum of its proper divisors (10660106650).

21320213294 is a wasteful number, since it uses less digits than its factorization.

21320213294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660106649.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21320213294 in words is "twenty-one billion, three hundred twenty million, two hundred thirteen thousand, two hundred ninety-four".