21402423222 has 8 divisors (see below), whose sum is σ = 42804846456. Its totient is φ = 7134141072.

The previous prime is 21402423221. The next prime is 21402423223. The reversal of 21402423222 is 22232420412.

It is an interprime number because it is at equal distance from previous prime (21402423221) and next prime (21402423223).

It is a sphenic number, since it is the product of 3 distinct primes.

21402423222 is an admirable number.

It is a super-2 number, since 2×21402423222² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21402423192 and 21402423201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402423221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1783535263 + ... + 1783535274.

It is an arithmetic number, because the mean of its divisors is an integer number (5350605807).

Almost surely, 2^21402423222 is an apocalyptic number.

21402423222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21402423222 is a wasteful number, since it uses less digits than its factorization.

21402423222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567070542.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21402423222 its reverse (22232420412), we get a palindrome (43634843634).

The spelling of 21402423222 in words is "twenty-one billion, four hundred two million, four hundred twenty-three thousand, two hundred twenty-two".