21707006051 has 2 divisors, whose sum is σ = 21707006052. Its totient is φ = 21707006050.

The previous prime is 21707005961. The next prime is 21707006059. The reversal of 21707006051 is 15060070712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21707006051 - 2²⁶ = 21639897187 is a prime.

It is a super-2 number, since 2×21707006051² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21707006059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10853503025 + 10853503026.

It is an arithmetic number, because the mean of its divisors is an integer number (10853503026).

Almost surely, 2^21707006051 is an apocalyptic number.

21707006051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21707006051 is an equidigital number, since it uses as much as digits as its factorization.

21707006051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 29.

Adding to 21707006051 its reverse (15060070712), we get a palindrome (36767076763).

The spelling of 21707006051 in words is "twenty-one billion, seven hundred seven million, six thousand, fifty-one".