21377119 has 2 divisors, whose sum is σ = 21377120. Its totient is φ = 21377118.

The previous prime is 21377093. The next prime is 21377129. The reversal of 21377119 is 91177312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21377119 - 2⁷ = 21376991 is a prime.

It is a super-2 number, since 2×21377119² = 913962433480322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21377129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688559 + 10688560.

It is an arithmetic number, because the mean of its divisors is an integer number (10688560).

Almost surely, 2^21377119 is an apocalyptic number.

21377119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21377119 is an equidigital number, since it uses as much as digits as its factorization.

21377119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 31.

The square root of 21377119 is about 4623.5396613417. The cubic root of 21377119 is about 277.5341256087.

The spelling of 21377119 in words is "twenty-one million, three hundred seventy-seven thousand, one hundred nineteen".