21323030022 has 72 divisors (see below), whose sum is σ = 56571348600. Its totient is φ = 5771642688.

The previous prime is 21323030021. The next prime is 21323030081. The reversal of 21323030022 is 22003032312.

It is a happy number.

21323030022 is a `hidden beast` number, since 21 + 323 + 0 + 300 + 22 = 666.

It is a super-3 number, since 3×21323030022³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21323029977 and 21323030004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323030021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 619447 + ... + 652962.

It is an arithmetic number, because the mean of its divisors is an integer number (785713175).

Almost surely, 2^21323030022 is an apocalyptic number.

21323030022 is an abundant number, since it is smaller than the sum of its proper divisors (35248318578).

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

21323030022 is a wasteful number, since it uses less digits than its factorization.

21323030022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272450 (or 1272440 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21323030022 its reverse (22003032312), we get a palindrome (43326062334).

The spelling of 21323030022 in words is "twenty-one billion, three hundred twenty-three million, thirty thousand, twenty-two".