20039873 has 12 divisors (see below), whose sum is σ = 23422212. Its totient is φ = 17095680.

The previous prime is 20039869. The next prime is 20039879. The reversal of 20039873 is 37893002.

It can be written as a sum of positive squares in 2 ways, for example, as 17581249 + 2458624 = 4193^2 + 1568^2 .

It is not a de Polignac number, because 20039873 - 2² = 20039869 is a prime.

It is a super-2 number, since 2×20039873² = 803193019712258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20039879) 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, 10961 + ... + 12657.

It is an arithmetic number, because the mean of its divisors is an integer number (1951851).

Almost surely, 2^20039873 is an apocalyptic number.

It is an amenable number.

20039873 is a deficient number, since it is larger than the sum of its proper divisors (3382339).

20039873 is a wasteful number, since it uses less digits than its factorization.

20039873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952 (or 1945 counting only the distinct ones).

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

The square root of 20039873 is about 4476.5916722435. The cubic root of 20039873 is about 271.6220285389.

The spelling of 20039873 in words is "twenty million, thirty-nine thousand, eight hundred seventy-three".