21833566090 has 16 divisors (see below), whose sum is σ = 44914764672. Its totient is φ = 7485794064.

The previous prime is 21833566067. The next prime is 21833566091. The reversal of 21833566090 is 9066533812.

It is not an unprimeable number, because it can be changed into a prime (21833566091) 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, 155953974 + ... + 155954113.

It is an arithmetic number, because the mean of its divisors is an integer number (2807172792).

Almost surely, 2^21833566090 is an apocalyptic number.

21833566090 is an abundant number, since it is smaller than the sum of its proper divisors (23081198582).

21833566090 is a wasteful number, since it uses less digits than its factorization.

21833566090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311908101.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 21833566090 in words is "twenty-one billion, eight hundred thirty-three million, five hundred sixty-six thousand, ninety".