21766133132 has 6 divisors (see below), whose sum is σ = 38090732988. Its totient is φ = 10883066564.

The previous prime is 21766133131. The next prime is 21766133171. The reversal of 21766133132 is 23133166712.

It is a junction number, because it is equal to n+sod(n) for n = 21766133092 and 21766133101.

It is not an unprimeable number, because it can be changed into a prime (21766133131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2720766638 + ... + 2720766645.

It is an arithmetic number, because the mean of its divisors is an integer number (6348455498).

Almost surely, 2^21766133132 is an apocalyptic number.

It is an amenable number.

21766133132 is a deficient number, since it is larger than the sum of its proper divisors (16324599856).

21766133132 is a wasteful number, since it uses less digits than its factorization.

21766133132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441533287 (or 5441533285 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

Adding to 21766133132 its reverse (23133166712), we get a palindrome (44899299844).

The spelling of 21766133132 in words is "twenty-one billion, seven hundred sixty-six million, one hundred thirty-three thousand, one hundred thirty-two".