21887827627 has 2 divisors, whose sum is σ = 21887827628. Its totient is φ = 21887827626.

The previous prime is 21887827603. The next prime is 21887827631. The reversal of 21887827627 is 72672878812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21887827627 - 2³¹ = 19740343979 is a prime.

It is a super-2 number, since 2×21887827627² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21887827697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10943913813 + 10943913814.

It is an arithmetic number, because the mean of its divisors is an integer number (10943913814).

Almost surely, 2^21887827627 is an apocalyptic number.

21887827627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21887827627 is an equidigital number, since it uses as much as digits as its factorization.

21887827627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8429568, while the sum is 58.

The spelling of 21887827627 in words is "twenty-one billion, eight hundred eighty-seven million, eight hundred twenty-seven thousand, six hundred twenty-seven".