20400546404553 has 8 divisors (see below), whose sum is σ = 31086546902208. Its totient is φ = 11657455088304.

The previous prime is 20400546404543. The next prime is 20400546404569. The reversal of 20400546404553 is 35540464500402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20400546404553 - 2²⁶ = 20400479295689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20400546404503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485727295326 + ... + 485727295367.

It is an arithmetic number, because the mean of its divisors is an integer number (3885818362776).

Almost surely, 2^{20400546404553} is an apocalyptic number.

It is an amenable number.

20400546404553 is a deficient number, since it is larger than the sum of its proper divisors (10686000497655).

20400546404553 is an equidigital number, since it uses as much as digits as its factorization.

20400546404553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971454590703.

The product of its (nonzero) digits is 1152000, while the sum is 42.

The spelling of 20400546404553 in words is "twenty trillion, four hundred billion, five hundred forty-six million, four hundred four thousand, five hundred fifty-three".