20453206040520 has 128 divisors (see below), whose sum is σ = 66950792663040. Its totient is φ = 4957387984640.

The previous prime is 20453206040497. The next prime is 20453206040549. The reversal of 20453206040520 is 2504060235402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 31 ways as a sum of consecutive naturals, for example, 5288809 + ... + 8299271.

It is an arithmetic number, because the mean of its divisors is an integer number (523053067680).

Almost surely, 2^{20453206040520} is an apocalyptic number.

20453206040520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20453206040520 is an abundant number, since it is smaller than the sum of its proper divisors (46497586622520).

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

20453206040520 is a wasteful number, since it uses less digits than its factorization.

20453206040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015635 (or 3015631 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 20453206040520 its reverse (2504060235402), we get a palindrome (22957266275922).

The spelling of 20453206040520 in words is "twenty trillion, four hundred fifty-three billion, two hundred six million, forty thousand, five hundred twenty".