20039004 has 18 divisors (see below), whose sum is σ = 50654240. Its totient is φ = 6679656.

The previous prime is 20038987. The next prime is 20039069. The reversal of 20039004 is 40093002.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278284 + ... + 278355.

Almost surely, 2^20039004 is an apocalyptic number.

It is an amenable number.

20039004 is an abundant number, since it is smaller than the sum of its proper divisors (30615236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20039004 is a wasteful number, since it uses less digits than its factorization.

20039004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556649 (or 556644 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20039004 is about 4476.4946107418. The cubic root of 20039004 is about 271.6181023171.

It can be divided in two parts, 200 and 39004, that added together give a square (39204 = 198²).

The spelling of 20039004 in words is "twenty million, thirty-nine thousand, four".