22533432421 has 2 divisors, whose sum is σ = 22533432422. Its totient is φ = 22533432420.

The previous prime is 22533432409. The next prime is 22533432457. The reversal of 22533432421 is 12423433522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16306013025 + 6227419396 = 127695^2 + 78914^2 .

It is a cyclic number.

It is not a de Polignac number, because 22533432421 - 2¹³ = 22533424229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22533432401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11266716210 + 11266716211.

It is an arithmetic number, because the mean of its divisors is an integer number (11266716211).

Almost surely, 2^22533432421 is an apocalyptic number.

It is an amenable number.

22533432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22533432421 is an equidigital number, since it uses as much as digits as its factorization.

22533432421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 31.

Adding to 22533432421 its reverse (12423433522), we get a palindrome (34956865943).

The spelling of 22533432421 in words is "twenty-two billion, five hundred thirty-three million, four hundred thirty-two thousand, four hundred twenty-one".