21073476 has 24 divisors (see below), whose sum is σ = 49460544. Its totient is φ = 6983200.

The previous prime is 21073471. The next prime is 21073511. The reversal of 21073476 is 67437012.

It is not an unprimeable number, because it can be changed into a prime (21073471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3000 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (2060856).

Almost surely, 2^21073476 is an apocalyptic number.

It is an amenable number.

21073476 is an abundant number, since it is smaller than the sum of its proper divisors (28387068).

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

21073476 is a wasteful number, since it uses less digits than its factorization.

21073476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331 (or 10329 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 21073476 is about 4590.5855835612. The cubic root of 21073476 is about 276.2138124762.

The spelling of 21073476 in words is "twenty-one million, seventy-three thousand, four hundred seventy-six".