21875448767 has 2 divisors, whose sum is σ = 21875448768. Its totient is φ = 21875448766.

The previous prime is 21875448719. The next prime is 21875448779. The reversal of 21875448767 is 76784457812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21875448767 - 2²² = 21871254463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21875448367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10937724383 + 10937724384.

It is an arithmetic number, because the mean of its divisors is an integer number (10937724384).

Almost surely, 2^21875448767 is an apocalyptic number.

21875448767 is a deficient number, since it is larger than the sum of its proper divisors (1).

21875448767 is an equidigital number, since it uses as much as digits as its factorization.

21875448767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21073920, while the sum is 59.

The spelling of 21875448767 in words is "twenty-one billion, eight hundred seventy-five million, four hundred forty-eight thousand, seven hundred sixty-seven".