20013240203353 has 8 divisors (see below), whose sum is σ = 20341430348616. Its totient is φ = 19685053420800.

The previous prime is 20013240203273. The next prime is 20013240203387. The reversal of 20013240203353 is 35330204231002.

It can be written as a sum of positive squares in 4 ways, for example, as 278349097744 + 19734891105609 = 527588^2 + 4442397^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20013240203353 - 2²⁹ = 20012703332441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013240203653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13017825 + ... + 14473777.

It is an arithmetic number, because the mean of its divisors is an integer number (2542678793577).

Almost surely, 2^{20013240203353} is an apocalyptic number.

It is an amenable number.

20013240203353 is a deficient number, since it is larger than the sum of its proper divisors (328190145263).

20013240203353 is a wasteful number, since it uses less digits than its factorization.

20013240203353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681355.

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 20013240203353 its reverse (35330204231002), we get a palindrome (55343444434355).

The spelling of 20013240203353 in words is "twenty trillion, thirteen billion, two hundred forty million, two hundred three thousand, three hundred fifty-three".