20404121541 has 32 divisors (see below), whose sum is σ = 28105515648. Its totient is φ = 13158850560.

The previous prime is 20404121519. The next prime is 20404121581. The reversal of 20404121541 is 14512140402.

It is not a de Polignac number, because 20404121541 - 2²² = 20399927237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404121581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8236195 + ... + 8238671.

It is an arithmetic number, because the mean of its divisors is an integer number (878297364).

Almost surely, 2^20404121541 is an apocalyptic number.

It is an amenable number.

20404121541 is a deficient number, since it is larger than the sum of its proper divisors (7701394107).

20404121541 is a wasteful number, since it uses less digits than its factorization.

20404121541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 20404121541 its reverse (14512140402), we get a palindrome (34916261943).

The spelling of 20404121541 in words is "twenty billion, four hundred four million, one hundred twenty-one thousand, five hundred forty-one".