21302383645192 has 24 divisors (see below), whose sum is σ = 43250771530890. Its totient is φ = 9831869374080.

The previous prime is 21302383645139. The next prime is 21302383645247. The reversal of 21302383645192 is 29154638320312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8982044964036 + 12320338681156 = 2997006^2 + 3510034^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7878099109 + ... + 7878101812.

Almost surely, 2^{21302383645192} is an apocalyptic number.

It is an amenable number.

21302383645192 is an abundant number, since it is smaller than the sum of its proper divisors (21948387885698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302383645192 is a wasteful number, since it uses less digits than its factorization.

21302383645192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15756200953 (or 15756200936 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 21302383645192 in words is "twenty-one trillion, three hundred two billion, three hundred eighty-three million, six hundred forty-five thousand, one hundred ninety-two".