21790000627 has 2 divisors, whose sum is σ = 21790000628. Its totient is φ = 21790000626.

The previous prime is 21790000621. The next prime is 21790000649. The reversal of 21790000627 is 72600009712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21790000627 - 2¹⁹ = 21789476339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21790000592 and 21790000601.

It is not a weakly prime, because it can be changed into another prime (21790000621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10895000313 + 10895000314.

It is an arithmetic number, because the mean of its divisors is an integer number (10895000314).

Almost surely, 2^21790000627 is an apocalyptic number.

21790000627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21790000627 is an equidigital number, since it uses as much as digits as its factorization.

21790000627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The spelling of 21790000627 in words is "twenty-one billion, seven hundred ninety million, six hundred twenty-seven", and thus it is an aban number.