20793503409 has 16 divisors (see below), whose sum is σ = 32283176832. Its totient is φ = 11657812608.

The previous prime is 20793503351. The next prime is 20793503417. The reversal of 20793503409 is 90430539702.

It is not a de Polignac number, because 20793503409 - 2¹¹ = 20793501361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20793503209) 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, 9340084 + ... + 9342309.

It is an arithmetic number, because the mean of its divisors is an integer number (2017698552).

Almost surely, 2^20793503409 is an apocalyptic number.

It is an amenable number.

20793503409 is a deficient number, since it is larger than the sum of its proper divisors (11489673423).

20793503409 is a wasteful number, since it uses less digits than its factorization.

20793503409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682456.

The product of its (nonzero) digits is 204120, while the sum is 42.

The spelling of 20793503409 in words is "twenty billion, seven hundred ninety-three million, five hundred three thousand, four hundred nine".