20812002104 has 8 divisors (see below), whose sum is σ = 39022503960. Its totient is φ = 10406001048.

The previous prime is 20812002103. The next prime is 20812002109. The reversal of 20812002104 is 40120021802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812002103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300750124 + ... + 1300750139.

It is an arithmetic number, because the mean of its divisors is an integer number (4877812995).

Almost surely, 2^20812002104 is an apocalyptic number.

It is an amenable number.

20812002104 is a deficient number, since it is larger than the sum of its proper divisors (18210501856).

20812002104 is a wasteful number, since it uses less digits than its factorization.

20812002104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601500269 (or 2601500265 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20812002104 its reverse (40120021802), we get a palindrome (60932023906).

The spelling of 20812002104 in words is "twenty billion, eight hundred twelve million, two thousand, one hundred four".