20404121445 has 24 divisors (see below), whose sum is σ = 36904847616. Its totient is φ = 10409058528.

The previous prime is 20404121411. The next prime is 20404121461. The reversal of 20404121445 is 54412140402.

20404121445 is a `hidden beast` number, since 2 + 0 + 404 + 1 + 214 + 45 = 666.

It is not a de Polignac number, because 20404121445 - 2¹⁰ = 20404120421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9856029 + ... + 9858098.

It is an arithmetic number, because the mean of its divisors is an integer number (1537701984).

Almost surely, 2^20404121445 is an apocalyptic number.

It is an amenable number.

20404121445 is a deficient number, since it is larger than the sum of its proper divisors (16500726171).

20404121445 is a wasteful number, since it uses less digits than its factorization.

20404121445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19714161 (or 19714158 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 20404121445 its reverse (54412140402), we get a palindrome (74816261847).

The spelling of 20404121445 in words is "twenty billion, four hundred four million, one hundred twenty-one thousand, four hundred forty-five".