20030439 has 16 divisors (see below), whose sum is σ = 31377024. Its totient is φ = 11205600.

The previous prime is 20030411. The next prime is 20030443. The reversal of 20030439 is 93403002.

It is not a de Polignac number, because 20030439 - 2⁵ = 20030407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22917 + ... + 23774.

It is an arithmetic number, because the mean of its divisors is an integer number (1961064).

Almost surely, 2^20030439 is an apocalyptic number.

20030439 is a deficient number, since it is larger than the sum of its proper divisors (11346585).

20030439 is a wasteful number, since it uses less digits than its factorization.

20030439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46718.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20030439 is about 4475.5378447735. The cubic root of 20030439 is about 271.5793987872.

The spelling of 20030439 in words is "twenty million, thirty thousand, four hundred thirty-nine".