21410769 has 16 divisors (see below), whose sum is σ = 31542912. Its totient is φ = 12849408.

The previous prime is 21410749. The next prime is 21410773. The reversal of 21410769 is 96701412.

It is a happy number.

It is not a de Polignac number, because 21410769 - 2¹¹ = 21408721 is a prime.

It is a super-2 number, since 2×21410769² = 916842058342722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (21410749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7954 + ... + 10299.

It is an arithmetic number, because the mean of its divisors is an integer number (1971432).

Almost surely, 2^21410769 is an apocalyptic number.

It is an amenable number.

21410769 is a deficient number, since it is larger than the sum of its proper divisors (10132143).

21410769 is a wasteful number, since it uses less digits than its factorization.

21410769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18296.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 21410769 is about 4627.1772172676. The cubic root of 21410769 is about 277.6796726206.

The spelling of 21410769 in words is "twenty-one million, four hundred ten thousand, seven hundred sixty-nine".