20104002 has 12 divisors (see below), whose sum is σ = 43558710. Its totient is φ = 6701328.

The previous prime is 20103977. The next prime is 20104003. The reversal of 20104002 is 20040102.

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 1879641 = 4269^2 + 1371^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20104003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558427 + ... + 558462.

Almost surely, 2^20104002 is an apocalyptic number.

20104002 is an abundant number, since it is smaller than the sum of its proper divisors (23454708).

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

20104002 is a wasteful number, since it uses less digits than its factorization.

20104002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116897 (or 1116894 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20104002 is about 4483.7486548646. The cubic root of 20104002 is about 271.9114565460.

Adding to 20104002 its reverse (20040102), we get a palindrome (40144104).

The spelling of 20104002 in words is "twenty million, one hundred four thousand, two".