20203518349 has 24 divisors (see below), whose sum is σ = 24765588000. Its totient is φ = 16388235360.

The previous prime is 20203518347. The next prime is 20203518373. The reversal of 20203518349 is 94381530202.

It is not a de Polignac number, because 20203518349 - 2¹ = 20203518347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203518347) 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 23 ways as a sum of consecutive naturals, for example, 892827 + ... + 915175.

It is an arithmetic number, because the mean of its divisors is an integer number (1031899500).

Almost surely, 2^20203518349 is an apocalyptic number.

It is an amenable number.

20203518349 is a deficient number, since it is larger than the sum of its proper divisors (4562069651).

20203518349 is a wasteful number, since it uses less digits than its factorization.

20203518349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23353 (or 23346 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 20203518349 in words is "twenty billion, two hundred three million, five hundred eighteen thousand, three hundred forty-nine".