20404100135 has 16 divisors (see below), whose sum is σ = 24631239360. Its totient is φ = 16225816320.

The previous prime is 20404100099. The next prime is 20404100137. The reversal of 20404100135 is 53100140402.

It is not a de Polignac number, because 20404100135 - 2²² = 20399905831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404100137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3000299 + ... + 3007091.

It is an arithmetic number, because the mean of its divisors is an integer number (1539452460).

Almost surely, 2^20404100135 is an apocalyptic number.

20404100135 is a deficient number, since it is larger than the sum of its proper divisors (4227139225).

20404100135 is a wasteful number, since it uses less digits than its factorization.

20404100135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20404100135 its reverse (53100140402), we get a palindrome (73504240537).

The spelling of 20404100135 in words is "twenty billion, four hundred four million, one hundred thousand, one hundred thirty-five".