23554021 has 2 divisors, whose sum is σ = 23554022. Its totient is φ = 23554020.

The previous prime is 23554009. The next prime is 23554031. The reversal of 23554021 is 12045532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21288996 + 2265025 = 4614^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 23554021 - 2¹³ = 23545829 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23553983 and 23554001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23554031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11777010 + 11777011.

It is an arithmetic number, because the mean of its divisors is an integer number (11777011).

Almost surely, 2^23554021 is an apocalyptic number.

It is an amenable number.

23554021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23554021 is an equidigital number, since it uses as much as digits as its factorization.

23554021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 23554021 is about 4853.2484997165. The cubic root of 23554021 is about 286.6520284275.

Adding to 23554021 its reverse (12045532), we get a palindrome (35599553).

The spelling of 23554021 in words is "twenty-three million, five hundred fifty-four thousand, twenty-one".