21766133130 has 64 divisors (see below), whose sum is σ = 59733704448. Its totient is φ = 4972423680.

The previous prime is 21766133101. The next prime is 21766133131. The reversal of 21766133130 is 3133166712.

It is a junction number, because it is equal to n+sod(n) for n = 21766133091 and 21766133100.

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 in 31 ways as a sum of consecutive naturals, for example, 374640 + ... + 428820.

It is an arithmetic number, because the mean of its divisors is an integer number (933339132).

Almost surely, 2^21766133130 is an apocalyptic number.

21766133130 is an abundant number, since it is smaller than the sum of its proper divisors (37967571318).

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

21766133130 is a wasteful number, since it uses less digits than its factorization.

21766133130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56111.

The product of its (nonzero) digits is 13608, while the sum is 33.

Adding to 21766133130 its reverse (3133166712), we get a palindrome (24899299842).

The spelling of 21766133130 in words is "twenty-one billion, seven hundred sixty-six million, one hundred thirty-three thousand, one hundred thirty".