20893110309 has 24 divisors (see below), whose sum is σ = 31094399232. Its totient is φ = 13508644320.

The previous prime is 20893110283. The next prime is 20893110377. The reversal of 20893110309 is 90301139802.

It is not a de Polignac number, because 20893110309 - 2¹⁹ = 20892586021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20893110389) 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, 2692 + ... + 204434.

It is an arithmetic number, because the mean of its divisors is an integer number (1295599968).

Almost surely, 2^20893110309 is an apocalyptic number.

It is an amenable number.

20893110309 is a deficient number, since it is larger than the sum of its proper divisors (10201288923).

20893110309 is a wasteful number, since it uses less digits than its factorization.

20893110309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202097 (or 202094 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 20893110309 in words is "twenty billion, eight hundred ninety-three million, one hundred ten thousand, three hundred nine".