21276854 has 8 divisors (see below), whose sum is σ = 32365008. Its totient is φ = 10488520.

The previous prime is 21276841. The next prime is 21276859. The reversal of 21276854 is 45867212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21276854² = 905409032274632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276859) 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 in 3 ways as a sum of consecutive naturals, for example, 74777 + ... + 75060.

It is an arithmetic number, because the mean of its divisors is an integer number (4045626).

Almost surely, 2^21276854 is an apocalyptic number.

21276854 is a deficient number, since it is larger than the sum of its proper divisors (11088154).

21276854 is a wasteful number, since it uses less digits than its factorization.

21276854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149910.

The product of its digits is 26880, while the sum is 35.

The square root of 21276854 is about 4612.6840342690. The cubic root of 21276854 is about 277.0995397886.

The spelling of 21276854 in words is "twenty-one million, two hundred seventy-six thousand, eight hundred fifty-four".