23021440237 has 2 divisors, whose sum is σ = 23021440238. Its totient is φ = 23021440236.

The previous prime is 23021440201. The next prime is 23021440331. The reversal of 23021440237 is 73204412032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22587384681 + 434055556 = 150291^2 + 20834^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021440237 - 2¹⁵ = 23021407469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23021441237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510720118 + 11510720119.

It is an arithmetic number, because the mean of its divisors is an integer number (11510720119).

Almost surely, 2^23021440237 is an apocalyptic number.

It is an amenable number.

23021440237 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021440237 is an equidigital number, since it uses as much as digits as its factorization.

23021440237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 23021440237 its reverse (73204412032), we get a palindrome (96225852269).

The spelling of 23021440237 in words is "twenty-three billion, twenty-one million, four hundred forty thousand, two hundred thirty-seven".