21276086 has 24 divisors (see below), whose sum is σ = 36387720. Its totient is φ = 9300096.

The previous prime is 21276083. The next prime is 21276109. The reversal of 21276086 is 68067212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4766 + ... + 8078.

It is an arithmetic number, because the mean of its divisors is an integer number (1516155).

Almost surely, 2^21276086 is an apocalyptic number.

21276086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21276086 is a deficient number, since it is larger than the sum of its proper divisors (15111634).

21276086 is a wasteful number, since it uses less digits than its factorization.

21276086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360 (or 3347 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 21276086 is about 4612.6007848068. The cubic root of 21276086 is about 277.0962057273.

The spelling of 21276086 in words is "twenty-one million, two hundred seventy-six thousand, eighty-six".