21046896 has 60 divisors (see below), whose sum is σ = 63438648. Its totient is φ = 6475392.

The previous prime is 21046877. The next prime is 21046897. The reversal of 21046896 is 69864012.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21046896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046897) 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, 3750 + ... + 7493.

Almost surely, 2^21046896 is an apocalyptic number.

21046896 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21046896 is an abundant number, since it is smaller than the sum of its proper divisors (42391752).

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

21046896 is a wasteful number, since it uses less digits than its factorization.

21046896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11270 (or 11261 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 21046896 is about 4587.6896146100. The cubic root of 21046896 is about 276.0976340153.

The spelling of 21046896 in words is "twenty-one million, forty-six thousand, eight hundred ninety-six".