20302404309 has 24 divisors (see below), whose sum is σ = 33873532992. Its totient is φ = 11580693120.

The previous prime is 20302404259. The next prime is 20302404329. The reversal of 20302404309 is 90340420302.

It is a happy number.

20302404309 is a `hidden beast` number, since 203 + 0 + 24 + 0 + 430 + 9 = 666.

It is not a de Polignac number, because 20302404309 - 2¹⁷ = 20302273237 is a prime.

It is a super-2 number, since 2×20302404309² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302404329) 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, 6029929 + ... + 6033294.

It is an arithmetic number, because the mean of its divisors is an integer number (1411397208).

Almost surely, 2^20302404309 is an apocalyptic number.

It is an amenable number.

20302404309 is a deficient number, since it is larger than the sum of its proper divisors (13571128683).

20302404309 is a wasteful number, since it uses less digits than its factorization.

20302404309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12063257 (or 12063254 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The spelling of 20302404309 in words is "twenty billion, three hundred two million, four hundred four thousand, three hundred nine".