20021040104 has 32 divisors (see below), whose sum is σ = 41519732520. Its totient is φ = 8990735616.

The previous prime is 20021040101. The next prime is 20021040191. The reversal of 20021040104 is 40104012002.

It can be written as a sum of positive squares in 4 ways, for example, as 20013760900 + 7279204 = 141470^2 + 2698^2 .

It is not an unprimeable number, because it can be changed into a prime (20021040101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2597639 + ... + 2605334.

Almost surely, 2^20021040104 is an apocalyptic number.

It is an amenable number.

20021040104 is an abundant number, since it is smaller than the sum of its proper divisors (21498692416).

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

20021040104 is a wasteful number, since it uses less digits than its factorization.

20021040104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5203029 (or 5203025 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021040104 its reverse (40104012002), we get a palindrome (60125052106).

The spelling of 20021040104 in words is "twenty billion, twenty-one million, forty thousand, one hundred four".