21409855483 has 2 divisors, whose sum is σ = 21409855484. Its totient is φ = 21409855482.

The previous prime is 21409855451. The next prime is 21409855487. The reversal of 21409855483 is 38455890412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21409855483 - 2⁵ = 21409855451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21409855487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10704927741 + 10704927742.

It is an arithmetic number, because the mean of its divisors is an integer number (10704927742).

Almost surely, 2^21409855483 is an apocalyptic number.

21409855483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21409855483 is an equidigital number, since it uses as much as digits as its factorization.

21409855483 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 21409855483 in words is "twenty-one billion, four hundred nine million, eight hundred fifty-five thousand, four hundred eighty-three".