20363540109 has 16 divisors (see below), whose sum is σ = 29912963904. Its totient is φ = 12219344000.

The previous prime is 20363540081. The next prime is 20363540173. The reversal of 20363540109 is 90104536302.

It is a cyclic number.

It is not a de Polignac number, because 20363540109 - 2⁵ = 20363540077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 20363540109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20363540209) 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, 3051504 + ... + 3058169.

It is an arithmetic number, because the mean of its divisors is an integer number (1869560244).

Almost surely, 2^20363540109 is an apocalyptic number.

It is an amenable number.

20363540109 is a deficient number, since it is larger than the sum of its proper divisors (9549423795).

20363540109 is a wasteful number, since it uses less digits than its factorization.

20363540109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6109788.

The product of its (nonzero) digits is 19440, while the sum is 33.

The spelling of 20363540109 in words is "twenty billion, three hundred sixty-three million, five hundred forty thousand, one hundred nine".