21914153 has 2 divisors, whose sum is σ = 21914154. Its totient is φ = 21914152.

The previous prime is 21914141. The next prime is 21914161. The reversal of 21914153 is 35141912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21603904 + 310249 = 4648^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 21914153 - 2¹⁴ = 21897769 is a prime.

It is not a weakly prime, because it can be changed into another prime (21914183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10957076 + 10957077.

It is an arithmetic number, because the mean of its divisors is an integer number (10957077).

Almost surely, 2^21914153 is an apocalyptic number.

It is an amenable number.

21914153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21914153 is an equidigital number, since it uses as much as digits as its factorization.

21914153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 21914153 is about 4681.2554939888. The cubic root of 21914153 is about 279.8389933194.

The spelling of 21914153 in words is "twenty-one million, nine hundred fourteen thousand, one hundred fifty-three".