20100004 has 12 divisors (see below), whose sum is σ = 36033228. Its totient is φ = 9804800.

The previous prime is 20099983. The next prime is 20100023. The reversal of 20100004 is 40000102.

It can be written as a sum of positive squares in 2 ways, for example, as 8526400 + 11573604 = 2920^2 + 3402^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20100004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61117 + ... + 61444.

It is an arithmetic number, because the mean of its divisors is an integer number (3002769).

Almost surely, 2^20100004 is an apocalyptic number.

It is an amenable number.

20100004 is a deficient number, since it is larger than the sum of its proper divisors (15933224).

20100004 is a wasteful number, since it uses less digits than its factorization.

20100004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122606 (or 122604 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20100004 is about 4483.3028003917. The cubic root of 20100004 is about 271.8934307142.

Adding to 20100004 its reverse (40000102), we get a palindrome (60100106).

The spelling of 20100004 in words is "twenty million, one hundred thousand, four".