21276894 has 32 divisors (see below), whose sum is σ = 46617120. Its totient is φ = 6444032.

The previous prime is 21276859. The next prime is 21276907. The reversal of 21276894 is 49867212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639 + ... + 6554.

It is an arithmetic number, because the mean of its divisors is an integer number (1456785).

Almost surely, 2^21276894 is an apocalyptic number.

21276894 is an abundant number, since it is smaller than the sum of its proper divisors (25340226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21276894 is a wasteful number, since it uses less digits than its factorization.

21276894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244.

The product of its digits is 48384, while the sum is 39.

The square root of 21276894 is about 4612.6883701373. The cubic root of 21276894 is about 277.0997134355.

The spelling of 21276894 in words is "twenty-one million, two hundred seventy-six thousand, eight hundred ninety-four".