21420470863007 has 2 divisors, whose sum is σ = 21420470863008. Its totient is φ = 21420470863006.

The previous prime is 21420470862997. The next prime is 21420470863009. The reversal of 21420470863007 is 70036807402412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21420470863007 - 2⁸ = 21420470862751 is a prime.

It is a super-2 number, since 2×21420470863007² (a number of 27 digits) contains 22 as substring.

Together with 21420470863009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21420470863009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10710235431503 + 10710235431504.

It is an arithmetic number, because the mean of its divisors is an integer number (10710235431504).

Almost surely, 2^{21420470863007} is an apocalyptic number.

21420470863007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21420470863007 is an equidigital number, since it uses as much as digits as its factorization.

21420470863007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 21420470863007 in words is "twenty-one trillion, four hundred twenty billion, four hundred seventy million, eight hundred sixty-three thousand, seven".