21412029 has 4 divisors (see below), whose sum is σ = 28549376. Its totient is φ = 14274684.

The previous prime is 21412021. The next prime is 21412033. The reversal of 21412029 is 92021412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21412029 - 2³ = 21412021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21411996 and 21412014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568669 + ... + 3568674.

It is an arithmetic number, because the mean of its divisors is an integer number (7137344).

Almost surely, 2^21412029 is an apocalyptic number.

It is an amenable number.

21412029 is a deficient number, since it is larger than the sum of its proper divisors (7137347).

21412029 is an equidigital number, since it uses as much as digits as its factorization.

21412029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137346.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21412029 is about 4627.3133673872. The cubic root of 21412029 is about 277.6851195607.

The spelling of 21412029 in words is "twenty-one million, four hundred twelve thousand, twenty-nine".