21458858627 has 2 divisors, whose sum is σ = 21458858628. Its totient is φ = 21458858626.

The previous prime is 21458858567. The next prime is 21458858669. The reversal of 21458858627 is 72685885412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21458858627 - 2¹⁸ = 21458596483 is a prime.

It is a super-2 number, since 2×21458858627² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21458857627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10729429313 + 10729429314.

It is an arithmetic number, because the mean of its divisors is an integer number (10729429314).

Almost surely, 2^21458858627 is an apocalyptic number.

21458858627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21458858627 is an equidigital number, since it uses as much as digits as its factorization.

21458858627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8601600, while the sum is 56.

It can be divided in two parts, 2145885 and 8627, that added together give a palindrome (2154512).

The spelling of 21458858627 in words is "twenty-one billion, four hundred fifty-eight million, eight hundred fifty-eight thousand, six hundred twenty-seven".