21783484922 has 16 divisors (see below), whose sum is σ = 35713343232. Its totient is φ = 9920372160.

The previous prime is 21783484913. The next prime is 21783484927. The reversal of 21783484922 is 22948438712.

It is not an unprimeable number, because it can be changed into a prime (21783484927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10332668 + ... + 10334775.

It is an arithmetic number, because the mean of its divisors is an integer number (2232083952).

Almost surely, 2^21783484922 is an apocalyptic number.

21783484922 is a deficient number, since it is larger than the sum of its proper divisors (13929858310).

21783484922 is a wasteful number, since it uses less digits than its factorization.

21783484922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20667493.

The product of its digits is 1548288, while the sum is 50.

The spelling of 21783484922 in words is "twenty-one billion, seven hundred eighty-three million, four hundred eighty-four thousand, nine hundred twenty-two".