20420134404 has 48 divisors (see below), whose sum is σ = 50191807680. Its totient is φ = 6443694720.

The previous prime is 20420134379. The next prime is 20420134433. The reversal of 20420134404 is 40443102402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282442 + ... + 347294.

It is an arithmetic number, because the mean of its divisors is an integer number (1045662660).

Almost surely, 2^20420134404 is an apocalyptic number.

It is an amenable number.

20420134404 is an abundant number, since it is smaller than the sum of its proper divisors (29771673276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20420134404 is a wasteful number, since it uses less digits than its factorization.

20420134404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66260 (or 66258 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20420134404 its reverse (40443102402), we get a palindrome (60863236806).

The spelling of 20420134404 in words is "twenty billion, four hundred twenty million, one hundred thirty-four thousand, four hundred four".