20001242403 has 48 divisors (see below), whose sum is σ = 30605268096. Its totient is φ = 12571027200.

The previous prime is 20001242399. The next prime is 20001242413. The reversal of 20001242403 is 30424210002.

20001242403 is a `hidden beast` number, since 20 + 0 + 0 + 1 + 242 + 403 = 666.

It is not a de Polignac number, because 20001242403 - 2² = 20001242399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001242413) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1574425 + ... + 1587077.

It is an arithmetic number, because the mean of its divisors is an integer number (637609752).

Almost surely, 2^20001242403 is an apocalyptic number.

20001242403 is a deficient number, since it is larger than the sum of its proper divisors (10604025693).

20001242403 is a wasteful number, since it uses less digits than its factorization.

20001242403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12844 (or 12841 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20001242403 its reverse (30424210002), we get a palindrome (50425452405).

The spelling of 20001242403 in words is "twenty billion, one million, two hundred forty-two thousand, four hundred three".