21268704 has 24 divisors (see below), whose sum is σ = 55830600. Its totient is φ = 7089536.

The previous prime is 21268699. The next prime is 21268727. The reversal of 21268704 is 40786212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110679 + ... + 110870.

It is an arithmetic number, because the mean of its divisors is an integer number (2326275).

Almost surely, 2^21268704 is an apocalyptic number.

21268704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21268704 is an abundant number, since it is smaller than the sum of its proper divisors (34561896).

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

21268704 is a wasteful number, since it uses less digits than its factorization.

21268704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221562 (or 221554 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 21268704 is about 4611.8005160675. The cubic root of 21268704 is about 277.0641547068.

The spelling of 21268704 in words is "twenty-one million, two hundred sixty-eight thousand, seven hundred four".