21433420097 has 2 divisors, whose sum is σ = 21433420098. Its totient is φ = 21433420096.

The previous prime is 21433420033. The next prime is 21433420153. The reversal of 21433420097 is 79002433412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20102702656 + 1330717441 = 141784^2 + 36479^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433420097 - 2⁶ = 21433420033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21439420097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716710048 + 10716710049.

It is an arithmetic number, because the mean of its divisors is an integer number (10716710049).

Almost surely, 2^21433420097 is an apocalyptic number.

It is an amenable number.

21433420097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433420097 is an equidigital number, since it uses as much as digits as its factorization.

21433420097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 21433420097 in words is "twenty-one billion, four hundred thirty-three million, four hundred twenty thousand, ninety-seven".