20993024 has 88 divisors (see below), whose sum is σ = 48145440. Its totient is φ = 9068544.

The previous prime is 20993017. The next prime is 20993033. The reversal of 20993024 is 42039902.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252887 + ... + 252969.

Almost surely, 2^20993024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20993024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24072720).

20993024 is an abundant number, since it is smaller than the sum of its proper divisors (27152416).

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

20993024 is a wasteful number, since it uses less digits than its factorization.

20993024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20993024 is about 4581.8144877330. The cubic root of 20993024 is about 275.8618646435.

The spelling of 20993024 in words is "twenty million, nine hundred ninety-three thousand, twenty-four".