21733366427 has 2 divisors, whose sum is σ = 21733366428. Its totient is φ = 21733366426.

The previous prime is 21733366393. The next prime is 21733366433. The reversal of 21733366427 is 72466333712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21733366427 - 2³² = 17438399131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21733365427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10866683213 + 10866683214.

It is an arithmetic number, because the mean of its divisors is an integer number (10866683214).

Almost surely, 2^21733366427 is an apocalyptic number.

21733366427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21733366427 is an equidigital number, since it uses as much as digits as its factorization.

21733366427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 44.

The spelling of 21733366427 in words is "twenty-one billion, seven hundred thirty-three million, three hundred sixty-six thousand, four hundred twenty-seven".