21914077 has 2 divisors, whose sum is σ = 21914078. Its totient is φ = 21914076.

The previous prime is 21914041. The next prime is 21914093. The reversal of 21914077 is 77041912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13498276 + 8415801 = 3674^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 21914077 - 2¹⁹ = 21389789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21914017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10957038 + 10957039.

It is an arithmetic number, because the mean of its divisors is an integer number (10957039).

Almost surely, 2^21914077 is an apocalyptic number.

It is an amenable number.

21914077 is a deficient number, since it is larger than the sum of its proper divisors (1).

21914077 is an equidigital number, since it uses as much as digits as its factorization.

21914077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 21914077 is about 4681.2473765013. The cubic root of 21914077 is about 279.8386698179.

Adding to 21914077 its reverse (77041912), we get a palindrome (98955989).

The spelling of 21914077 in words is "twenty-one million, nine hundred fourteen thousand, seventy-seven".