20073839 has 4 divisors (see below), whose sum is σ = 20086080. Its totient is φ = 20061600.

The previous prime is 20073811. The next prime is 20073847. The reversal of 20073839 is 93837002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20073839 - 2¹² = 20069743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20073439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3194 + ... + 7095.

It is an arithmetic number, because the mean of its divisors is an integer number (5021520).

Almost surely, 2^20073839 is an apocalyptic number.

20073839 is a deficient number, since it is larger than the sum of its proper divisors (12241).

20073839 is a wasteful number, since it uses less digits than its factorization.

20073839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20073839 is about 4480.3838005242. The cubic root of 20073839 is about 271.7754012062.

The spelling of 20073839 in words is "twenty million, seventy-three thousand, eight hundred thirty-nine".