2020242421553 has 4 divisors (see below), whose sum is σ = 2021266367988. Its totient is φ = 2019218475120.

The previous prime is 2020242421541. The next prime is 2020242421559. The reversal of 2020242421553 is 3551242420202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 912850306624 + 1107392114929 = 955432^2 + 1052327^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020242421553 - 2¹⁸ = 2020242159409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020242421559) 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, 511970258 + ... + 511974203.

It is an arithmetic number, because the mean of its divisors is an integer number (505316591997).

Almost surely, 2^{2020242421553} is an apocalyptic number.

It is an amenable number.

2020242421553 is a deficient number, since it is larger than the sum of its proper divisors (1023946435).

2020242421553 is a wasteful number, since it uses less digits than its factorization.

2020242421553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023946434.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 2020242421553 its reverse (3551242420202), we get a palindrome (5571484841755).

The spelling of 2020242421553 in words is "two trillion, twenty billion, two hundred forty-two million, four hundred twenty-one thousand, five hundred fifty-three".