27019021 has 2 divisors, whose sum is σ = 27019022. Its totient is φ = 27019020.

The previous prime is 27019009. The next prime is 27019037. The reversal of 27019021 is 12091072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13616100 + 13402921 = 3690^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 27019021 - 2¹³ = 27010829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27018983 and 27019001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27014021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13509510 + 13509511.

It is an arithmetic number, because the mean of its divisors is an integer number (13509511).

Almost surely, 2^27019021 is an apocalyptic number.

It is an amenable number.

27019021 is a deficient number, since it is larger than the sum of its proper divisors (1).

27019021 is an equidigital number, since it uses as much as digits as its factorization.

27019021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 27019021 is about 5197.9823970460. The cubic root of 27019021 is about 300.0704316115.

It can be divided in two parts, 270 and 19021, that added together give a palindrome (19291).

The spelling of 27019021 in words is "twenty-seven million, nineteen thousand, twenty-one".