20455043132420 has 144 divisors (see below), whose sum is σ = 47044506922560. Its totient is φ = 7466986695168.

The previous prime is 20455043132417. The next prime is 20455043132521. The reversal of 20455043132420 is 2423134055402.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104570747 + ... + 104766173.

It is an arithmetic number, because the mean of its divisors is an integer number (326697964740).

Almost surely, 2^{20455043132420} is an apocalyptic number.

20455043132420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20455043132420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23522253461280).

20455043132420 is an abundant number, since it is smaller than the sum of its proper divisors (26589463790140).

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

20455043132420 is a wasteful number, since it uses less digits than its factorization.

20455043132420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195814 (or 195799 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 20455043132420 its reverse (2423134055402), we get a palindrome (22878177187822).

The spelling of 20455043132420 in words is "twenty trillion, four hundred fifty-five billion, forty-three million, one hundred thirty-two thousand, four hundred twenty".