20311013403 has 6 divisors (see below), whose sum is σ = 29338130484. Its totient is φ = 13540675596.

The previous prime is 20311013399. The next prime is 20311013467. The reversal of 20311013403 is 30431011302.

It is not a de Polignac number, because 20311013403 - 2² = 20311013399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20311013603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128389625 + ... + 1128389642.

It is an arithmetic number, because the mean of its divisors is an integer number (4889688414).

Almost surely, 2^20311013403 is an apocalyptic number.

20311013403 is a deficient number, since it is larger than the sum of its proper divisors (9027117081).

20311013403 is a wasteful number, since it uses less digits than its factorization.

20311013403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256779273 (or 2256779270 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20311013403 its reverse (30431011302), we get a palindrome (50742024705).

The spelling of 20311013403 in words is "twenty billion, three hundred eleven million, thirteen thousand, four hundred three".