21769714927 has 2 divisors, whose sum is σ = 21769714928. Its totient is φ = 21769714926.

The previous prime is 21769714903. The next prime is 21769714957. The reversal of 21769714927 is 72941796712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21769714927 - 2¹⁵ = 21769682159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21769714957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10884857463 + 10884857464.

It is an arithmetic number, because the mean of its divisors is an integer number (10884857464).

Almost surely, 2^21769714927 is an apocalyptic number.

21769714927 is a deficient number, since it is larger than the sum of its proper divisors (1).

21769714927 is an equidigital number, since it uses as much as digits as its factorization.

21769714927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 55.

The spelling of 21769714927 in words is "twenty-one billion, seven hundred sixty-nine million, seven hundred fourteen thousand, nine hundred twenty-seven".