22342340021 has 4 divisors (see below), whose sum is σ = 22364396652. Its totient is φ = 22320283392.

The previous prime is 22342340017. The next prime is 22342340023. The reversal of 22342340021 is 12004324322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4794039121 + 17548300900 = 69239^2 + 132470^2 .

It is a cyclic number.

It is not a de Polignac number, because 22342340021 - 2² = 22342340017 is a prime.

It is a super-2 number, since 2×22342340021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22342340023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11026796 + ... + 11028821.

It is an arithmetic number, because the mean of its divisors is an integer number (5591099163).

Almost surely, 2^22342340021 is an apocalyptic number.

It is an amenable number.

22342340021 is a deficient number, since it is larger than the sum of its proper divisors (22056631).

22342340021 is a wasteful number, since it uses less digits than its factorization.

22342340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22056630.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 22342340021 its reverse (12004324322), we get a palindrome (34346664343).

The spelling of 22342340021 in words is "twenty-two billion, three hundred forty-two million, three hundred forty thousand, twenty-one".