20001112553 has 4 divisors (see below), whose sum is σ = 20022234000. Its totient is φ = 19979991108.

The previous prime is 20001112543. The next prime is 20001112559. The reversal of 20001112553 is 35521110002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20001112553 - 2²⁶ = 19934003689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001112559) 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, 10559303 + ... + 10561196.

It is an arithmetic number, because the mean of its divisors is an integer number (5005558500).

Almost surely, 2^20001112553 is an apocalyptic number.

It is an amenable number.

20001112553 is a deficient number, since it is larger than the sum of its proper divisors (21121447).

20001112553 is an equidigital number, since it uses as much as digits as its factorization.

20001112553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121446.

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 20001112553 its reverse (35521110002), we get a palindrome (55522222555).

The spelling of 20001112553 in words is "twenty billion, one million, one hundred twelve thousand, five hundred fifty-three".