21786092052 has 24 divisors (see below), whose sum is σ = 50843266656. Its totient is φ = 7260737568.

The previous prime is 21786092021. The next prime is 21786092077. The reversal of 21786092052 is 25029068712.

It is a super-3 number, since 3×21786092052³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21786091995 and 21786092013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90178 + ... + 227385.

It is an arithmetic number, because the mean of its divisors is an integer number (2118469444).

Almost surely, 2^21786092052 is an apocalyptic number.

It is an amenable number.

21786092052 is an abundant number, since it is smaller than the sum of its proper divisors (29057174604).

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

21786092052 is a wasteful number, since it uses less digits than its factorization.

21786092052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323287 (or 323285 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 21786092052 in words is "twenty-one billion, seven hundred eighty-six million, ninety-two thousand, fifty-two".