20744793 has 12 divisors (see below), whose sum is σ = 30004260. Its totient is φ = 13811616.

The previous prime is 20744747. The next prime is 20744803. The reversal of 20744793 is 39744702.

20744793 is a `hidden beast` number, since 207 + 447 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6365529 + 14379264 = 2523^2 + 3792^2 .

It is not a de Polignac number, because 20744793 - 2¹⁶ = 20679257 is a prime.

It is a super-2 number, since 2×20744793² = 860692873225698, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20744723) 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, 12055 + ... + 13667.

It is an arithmetic number, because the mean of its divisors is an integer number (2500355).

Almost surely, 2^20744793 is an apocalyptic number.

It is an amenable number.

20744793 is a deficient number, since it is larger than the sum of its proper divisors (9259467).

20744793 is a wasteful number, since it uses less digits than its factorization.

20744793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048 (or 3045 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20744793 is about 4554.6452112102. The cubic root of 20744793 is about 274.7702455659.

The spelling of 20744793 in words is "twenty million, seven hundred forty-four thousand, seven hundred ninety-three".