21640411483 has 2 divisors, whose sum is σ = 21640411484. Its totient is φ = 21640411482.

The previous prime is 21640411439. The next prime is 21640411517. The reversal of 21640411483 is 38411404612.

It is an a-pointer prime, because the next prime (21640411517) can be obtained adding 21640411483 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21640411483 is a prime.

It is not a weakly prime, because it can be changed into another prime (21640411183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10820205741 + 10820205742.

It is an arithmetic number, because the mean of its divisors is an integer number (10820205742).

Almost surely, 2^21640411483 is an apocalyptic number.

21640411483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21640411483 is an equidigital number, since it uses as much as digits as its factorization.

21640411483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 21640411483 in words is "twenty-one billion, six hundred forty million, four hundred eleven thousand, four hundred eighty-three".