21062719 has 2 divisors, whose sum is σ = 21062720. Its totient is φ = 21062718.

The previous prime is 21062707. The next prime is 21062737. The reversal of 21062719 is 91726012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21062719 - 2¹⁵ = 21029951 is a prime.

It is a super-2 number, since 2×21062719² = 887276263345922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21062749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531359 + 10531360.

It is an arithmetic number, because the mean of its divisors is an integer number (10531360).

Almost surely, 2^21062719 is an apocalyptic number.

21062719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21062719 is an equidigital number, since it uses as much as digits as its factorization.

21062719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 21062719 is about 4589.4137969898. The cubic root of 21062719 is about 276.1668065040.

The spelling of 21062719 in words is "twenty-one million, sixty-two thousand, seven hundred nineteen".