21276700 has 36 divisors (see below), whose sum is σ = 46403280. Its totient is φ = 8467840.

The previous prime is 21276683. The next prime is 21276727. The reversal of 21276700 is 767212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25896 + ... + 26704.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^21276700 is an apocalyptic number.

21276700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21276700 is an abundant number, since it is smaller than the sum of its proper divisors (25126580).

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

21276700 is a wasteful number, since it uses less digits than its factorization.

21276700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 21276700 is about 4612.6673411379. The cubic root of 21276700 is about 277.0988712463.

The spelling of 21276700 in words is "twenty-one million, two hundred seventy-six thousand, seven hundred".