21676271803 has 2 divisors, whose sum is σ = 21676271804. Its totient is φ = 21676271802.

The previous prime is 21676271779. The next prime is 21676271807. The reversal of 21676271803 is 30817267612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21676271803 - 2⁹ = 21676271291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21676271803.

It is not a weakly prime, because it can be changed into another prime (21676271807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10838135901 + 10838135902.

It is an arithmetic number, because the mean of its divisors is an integer number (10838135902).

Almost surely, 2^21676271803 is an apocalyptic number.

21676271803 is a deficient number, since it is larger than the sum of its proper divisors (1).

21676271803 is an equidigital number, since it uses as much as digits as its factorization.

21676271803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 21676271803 in words is "twenty-one billion, six hundred seventy-six million, two hundred seventy-one thousand, eight hundred three".