21073762 has 8 divisors (see below), whose sum is σ = 31672656. Its totient is φ = 10516212.

The previous prime is 21073739. The next prime is 21073799. The reversal of 21073762 is 26737012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21073762.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9028 + ... + 11119.

It is an arithmetic number, because the mean of its divisors is an integer number (3959082).

Almost surely, 2^21073762 is an apocalyptic number.

21073762 is a deficient number, since it is larger than the sum of its proper divisors (10598894).

21073762 is a wasteful number, since it uses less digits than its factorization.

21073762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20672.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 21073762 is about 4590.6167341655. The cubic root of 21073762 is about 276.2150620216.

The spelling of 21073762 in words is "twenty-one million, seventy-three thousand, seven hundred sixty-two".