21748978483 has 2 divisors, whose sum is σ = 21748978484. Its totient is φ = 21748978482.

The previous prime is 21748978453. The next prime is 21748978487. The reversal of 21748978483 is 38487984712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21748978483 - 2²⁵ = 21715424051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21748978487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10874489241 + 10874489242.

It is an arithmetic number, because the mean of its divisors is an integer number (10874489242).

Almost surely, 2^21748978483 is an apocalyptic number.

21748978483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21748978483 is an equidigital number, since it uses as much as digits as its factorization.

21748978483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 61.

The spelling of 21748978483 in words is "twenty-one billion, seven hundred forty-eight million, nine hundred seventy-eight thousand, four hundred eighty-three".