21030007927 has 2 divisors, whose sum is σ = 21030007928. Its totient is φ = 21030007926.

The previous prime is 21030007907. The next prime is 21030007951. The reversal of 21030007927 is 72970003012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030007927 is a prime.

It is a super-2 number, since 2×21030007927² (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 (21030007907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515003963 + 10515003964.

It is an arithmetic number, because the mean of its divisors is an integer number (10515003964).

Almost surely, 2^21030007927 is an apocalyptic number.

21030007927 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030007927 is an equidigital number, since it uses as much as digits as its factorization.

21030007927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The spelling of 21030007927 in words is "twenty-one billion, thirty million, seven thousand, nine hundred twenty-seven".