21167114747 has 2 divisors, whose sum is σ = 21167114748. Its totient is φ = 21167114746.

The previous prime is 21167114737. The next prime is 21167114779. The reversal of 21167114747 is 74741176112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21167114747 - 2¹⁴ = 21167098363 is a prime.

It is not a weakly prime, because it can be changed into another prime (21167114707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10583557373 + 10583557374.

It is an arithmetic number, because the mean of its divisors is an integer number (10583557374).

Almost surely, 2^21167114747 is an apocalyptic number.

21167114747 is a deficient number, since it is larger than the sum of its proper divisors (1).

21167114747 is an equidigital number, since it uses as much as digits as its factorization.

21167114747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 41.

The spelling of 21167114747 in words is "twenty-one billion, one hundred sixty-seven million, one hundred fourteen thousand, seven hundred forty-seven".