20003451243 has 4 divisors (see below), whose sum is σ = 26671268328. Its totient is φ = 13335634160.

The previous prime is 20003451211. The next prime is 20003451253. The reversal of 20003451243 is 34215430002.

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

It is a cyclic number.

It is not a de Polignac number, because 20003451243 - 2⁵ = 20003451211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20003451253) 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, 3333908538 + ... + 3333908543.

It is an arithmetic number, because the mean of its divisors is an integer number (6667817082).

Almost surely, 2^20003451243 is an apocalyptic number.

20003451243 is a deficient number, since it is larger than the sum of its proper divisors (6667817085).

20003451243 is an equidigital number, since it uses as much as digits as its factorization.

20003451243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667817084.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20003451243 its reverse (34215430002), we get a palindrome (54218881245).

The spelling of 20003451243 in words is "twenty billion, three million, four hundred fifty-one thousand, two hundred forty-three".