20403102313 has 16 divisors (see below), whose sum is σ = 23586754176. Its totient is φ = 17442730240.

The previous prime is 20403102311. The next prime is 20403102319. The reversal of 20403102313 is 31320130402.

It is a cyclic number.

It is not a de Polignac number, because 20403102313 - 2¹ = 20403102311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403102311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184095 + ... + 273307.

It is an arithmetic number, because the mean of its divisors is an integer number (1474172136).

Almost surely, 2^20403102313 is an apocalyptic number.

It is an amenable number.

20403102313 is a deficient number, since it is larger than the sum of its proper divisors (3183651863).

20403102313 is a wasteful number, since it uses less digits than its factorization.

20403102313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90464.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20403102313 its reverse (31320130402), we get a palindrome (51723232715).

The spelling of 20403102313 in words is "twenty billion, four hundred three million, one hundred two thousand, three hundred thirteen".