23361421 has 2 divisors, whose sum is σ = 23361422. Its totient is φ = 23361420.

The previous prime is 23361419. The next prime is 23361439. The reversal of 23361421 is 12416332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22905796 + 455625 = 4786^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 23361421 - 2¹ = 23361419 is a prime.

It is a super-2 number, since 2×23361421² = 1091511982278482, which contains 22 as substring.

Together with 23361419, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23361392 and 23361401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23361461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11680710 + 11680711.

It is an arithmetic number, because the mean of its divisors is an integer number (11680711).

Almost surely, 2^23361421 is an apocalyptic number.

It is an amenable number.

23361421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23361421 is an equidigital number, since it uses as much as digits as its factorization.

23361421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 23361421 is about 4833.3653906983. The cubic root of 23361421 is about 285.8685762251.

Adding to 23361421 its reverse (12416332), we get a palindrome (35777753).

The spelling of 23361421 in words is "twenty-three million, three hundred sixty-one thousand, four hundred twenty-one".