21314475811 has 2 divisors, whose sum is σ = 21314475812. Its totient is φ = 21314475810.

The previous prime is 21314475691. The next prime is 21314475817. The reversal of 21314475811 is 11857441312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21314475811 is a prime.

It is not a weakly prime, because it can be changed into another prime (21314475817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10657237905 + 10657237906.

It is an arithmetic number, because the mean of its divisors is an integer number (10657237906).

Almost surely, 2^21314475811 is an apocalyptic number.

21314475811 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314475811 is an equidigital number, since it uses as much as digits as its factorization.

21314475811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The spelling of 21314475811 in words is "twenty-one billion, three hundred fourteen million, four hundred seventy-five thousand, eight hundred eleven".