20743329 has 12 divisors (see below), whose sum is σ = 28371728. Its totient is φ = 13473600.

The previous prime is 20743271. The next prime is 20743337. The reversal of 20743329 is 92334702.

It is not a de Polignac number, because 20743329 - 2⁹ = 20742817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20743296 and 20743305.

It is not an unprimeable number, because it can be changed into a prime (20743369) 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, 51529 + ... + 51929.

Almost surely, 2^20743329 is an apocalyptic number.

It is an amenable number.

20743329 is a deficient number, since it is larger than the sum of its proper divisors (7628399).

20743329 is an frugal number, since it uses more digits than its factorization.

20743329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20743329 is about 4554.4844933318. The cubic root of 20743329 is about 274.7637817254.

The spelling of 20743329 in words is "twenty million, seven hundred forty-three thousand, three hundred twenty-nine".