21464374292 has 12 divisors (see below), whose sum is σ = 37564834356. Its totient is φ = 10731564480.

The previous prime is 21464374289. The next prime is 21464374319. The reversal of 21464374292 is 29247346412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14238694276 + 7225680016 = 119326^2 + 85004^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73259 + ... + 219762.

It is an arithmetic number, because the mean of its divisors is an integer number (3130402863).

Almost surely, 2^21464374292 is an apocalyptic number.

It is an amenable number.

21464374292 is a deficient number, since it is larger than the sum of its proper divisors (16100460064).

21464374292 is a wasteful number, since it uses less digits than its factorization.

21464374292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311338 (or 311336 counting only the distinct ones).

The product of its digits is 580608, while the sum is 44.

The spelling of 21464374292 in words is "twenty-one billion, four hundred sixty-four million, three hundred seventy-four thousand, two hundred ninety-two".