21057626265232 has 20 divisors (see below), whose sum is σ = 40799340511020. Its totient is φ = 10528764197888.

The previous prime is 21057626265229. The next prime is 21057626265233. The reversal of 21057626265232 is 23256262675012.

It can be written as a sum of positive squares in 2 ways, for example, as 19489611407616 + 1568014857616 = 4414704^2 + 1252204^2 .

It is not an unprimeable number, because it can be changed into a prime (21057626265233) 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, 626244 + ... + 6519772.

It is an arithmetic number, because the mean of its divisors is an integer number (2039967025551).

Almost surely, 2^{21057626265232} is an apocalyptic number.

It is an amenable number.

21057626265232 is a deficient number, since it is larger than the sum of its proper divisors (19741714245788).

21057626265232 is a wasteful number, since it uses less digits than its factorization.

21057626265232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6116850 (or 6116844 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 21057626265232 in words is "twenty-one trillion, fifty-seven billion, six hundred twenty-six million, two hundred sixty-five thousand, two hundred thirty-two".