54020455421 has 4 divisors (see below), whose sum is σ = 54114078972. Its totient is φ = 53926831872.

The previous prime is 54020455393. The next prime is 54020455439. The reversal of 54020455421 is 12455402045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12455402045 = 5 ⋅2491080409.

It can be written as a sum of positive squares in 2 ways, for example, as 35829189796 + 18191265625 = 189286^2 + 134875^2 .

It is a cyclic number.

It is not a de Polignac number, because 54020455421 - 2³⁰ = 52946713597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54020155421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46810910 + ... + 46812063.

It is an arithmetic number, because the mean of its divisors is an integer number (13528519743).

Almost surely, 2^54020455421 is an apocalyptic number.

It is an amenable number.

54020455421 is a deficient number, since it is larger than the sum of its proper divisors (93623551).

54020455421 is an equidigital number, since it uses as much as digits as its factorization.

54020455421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93623550.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 54020455421 its reverse (12455402045), we get a palindrome (66475857466).

The spelling of 54020455421 in words is "fifty-four billion, twenty million, four hundred fifty-five thousand, four hundred twenty-one".