20404121131 has 8 divisors (see below), whose sum is σ = 21017269728. Its totient is φ = 19796472000.

The previous prime is 20404121119. The next prime is 20404121137. The reversal of 20404121131 is 13112140402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20404121131 - 2²¹ = 20402023979 is a prime.

It is a super-2 number, since 2×20404121131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20404121099 and 20404121108.

It is not an unprimeable number, because it can be changed into a prime (20404121137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367335 + ... + 1382176.

It is an arithmetic number, because the mean of its divisors is an integer number (2627158716).

Almost surely, 2^20404121131 is an apocalyptic number.

20404121131 is a deficient number, since it is larger than the sum of its proper divisors (613148597).

20404121131 is a wasteful number, since it uses less digits than its factorization.

20404121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749733.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20404121131 its reverse (13112140402), we get a palindrome (33516261533).

The spelling of 20404121131 in words is "twenty billion, four hundred four million, one hundred twenty-one thousand, one hundred thirty-one".