21838425815286 has 48 divisors (see below), whose sum is σ = 47601316998144. Its totient is φ = 7235673562032.

The previous prime is 21838425815273. The next prime is 21838425815287. The reversal of 21838425815286 is 68251852483812.

21838425815286 is a `hidden beast` number, since 2 + 1 + 8 + 3 + 8 + 4 + 25 + 81 + 528 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21838425815287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128219995 + ... + 128390201.

It is an arithmetic number, because the mean of its divisors is an integer number (991694104128).

Almost surely, 2^{21838425815286} is an apocalyptic number.

21838425815286 is an abundant number, since it is smaller than the sum of its proper divisors (25762891182858).

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

21838425815286 is a wasteful number, since it uses less digits than its factorization.

21838425815286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213065 (or 213062 counting only the distinct ones).

The product of its digits is 58982400, while the sum is 63.

The spelling of 21838425815286 in words is "twenty-one trillion, eight hundred thirty-eight billion, four hundred twenty-five million, eight hundred fifteen thousand, two hundred eighty-six".