20158911003 has 24 divisors (see below), whose sum is σ = 34109328960. Its totient is φ = 10472160720.

The previous prime is 20158910987. The next prime is 20158911007. The reversal of 20158911003 is 30011985102.

It is not a de Polignac number, because 20158911003 - 2⁴ = 20158910987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20158911007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6231813 + ... + 6235046.

It is an arithmetic number, because the mean of its divisors is an integer number (1421222040).

Almost surely, 2^20158911003 is an apocalyptic number.

20158911003 is a deficient number, since it is larger than the sum of its proper divisors (13950417957).

20158911003 is a wasteful number, since it uses less digits than its factorization.

20158911003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12466887 (or 12466880 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 20158911003 in words is "twenty billion, one hundred fifty-eight million, nine hundred eleven thousand, three".