21962908433 has 2 divisors, whose sum is σ = 21962908434. Its totient is φ = 21962908432.

The previous prime is 21962908417. The next prime is 21962908493. The reversal of 21962908433 is 33480926912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19201090624 + 2761817809 = 138568^2 + 52553^2 .

It is a cyclic number.

It is not a de Polignac number, because 21962908433 - 2⁴ = 21962908417 is a prime.

It is not a weakly prime, because it can be changed into another prime (21962908493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10981454216 + 10981454217.

It is an arithmetic number, because the mean of its divisors is an integer number (10981454217).

Almost surely, 2^21962908433 is an apocalyptic number.

It is an amenable number.

21962908433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21962908433 is an equidigital number, since it uses as much as digits as its factorization.

21962908433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 21962908433 in words is "twenty-one billion, nine hundred sixty-two million, nine hundred eight thousand, four hundred thirty-three".