21294762292 has 48 divisors (see below), whose sum is σ = 41921908560. Its totient is φ = 9413978112.

The previous prime is 21294762289. The next prime is 21294762299. The reversal of 21294762292 is 29226749212.

It can be written as a sum of positive squares in 8 ways, for example, as 2052633636 + 19242128656 = 45306^2 + 138716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21294762299) 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, 72963 + ... + 218890.

It is an arithmetic number, because the mean of its divisors is an integer number (873373095).

Almost surely, 2^21294762292 is an apocalyptic number.

21294762292 is the 72964-th decagonal number.

It is an amenable number.

21294762292 is a deficient number, since it is larger than the sum of its proper divisors (20627146268).

21294762292 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (21294762291) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (291938).

21294762292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291940 (or 291938 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The spelling of 21294762292 in words is "twenty-one billion, two hundred ninety-four million, seven hundred sixty-two thousand, two hundred ninety-two".