21274714207 has 2 divisors, whose sum is σ = 21274714208. Its totient is φ = 21274714206.

The previous prime is 21274714199. The next prime is 21274714211. The reversal of 21274714207 is 70241747212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21274714207 - 2³ = 21274714199 is a prime.

It is a super-2 number, since 2×21274714207² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21274714507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637357103 + 10637357104.

It is an arithmetic number, because the mean of its divisors is an integer number (10637357104).

Almost surely, 2^21274714207 is an apocalyptic number.

21274714207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21274714207 is an equidigital number, since it uses as much as digits as its factorization.

21274714207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 37.

The spelling of 21274714207 in words is "twenty-one billion, two hundred seventy-four million, seven hundred fourteen thousand, two hundred seven".