20305040304 has 80 divisors (see below), whose sum is σ = 53484862464. Its totient is φ = 6635616000.

The previous prime is 20305040291. The next prime is 20305040311. The reversal of 20305040304 is 40304050302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4961299 + ... + 4965389.

Almost surely, 2^20305040304 is an apocalyptic number.

20305040304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20305040304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26742431232).

20305040304 is an abundant number, since it is smaller than the sum of its proper divisors (33179822160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20305040304 is a wasteful number, since it uses less digits than its factorization.

20305040304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106 (or 6100 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 20305040304 its reverse (40304050302), we get a palindrome (60609090606).

The spelling of 20305040304 in words is "twenty billion, three hundred five million, forty thousand, three hundred four".