21434876 has 12 divisors (see below), whose sum is σ = 37557072. Its totient is φ = 10704288.

The previous prime is 21434839. The next prime is 21434879. The reversal of 21434876 is 67843412.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434879) 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 3 ways as a sum of consecutive naturals, for example, 1001 + ... + 6623.

It is an arithmetic number, because the mean of its divisors is an integer number (3129756).

Almost surely, 2^21434876 is an apocalyptic number.

It is an amenable number.

21434876 is a deficient number, since it is larger than the sum of its proper divisors (16122196).

21434876 is a wasteful number, since it uses less digits than its factorization.

21434876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580 (or 6578 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 21434876 is about 4629.7814203264. The cubic root of 21434876 is about 277.7838493725.

The spelling of 21434876 in words is "twenty-one million, four hundred thirty-four thousand, eight hundred seventy-six".