20434403304 has 80 divisors (see below), whose sum is σ = 65411728800. Its totient is φ = 5838399648.

The previous prime is 20434403299. The next prime is 20434403317. The reversal of 20434403304 is 40330443402.

It is a super-2 number, since 2×20434403304² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2247934 + ... + 2257005.

It is an arithmetic number, because the mean of its divisors is an integer number (817646610).

Almost surely, 2^20434403304 is an apocalyptic number.

20434403304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20434403304 is an abundant number, since it is smaller than the sum of its proper divisors (44977325496).

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

20434403304 is a wasteful number, since it uses less digits than its factorization.

20434403304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504964 (or 4504951 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20434403304 its reverse (40330443402), we get a palindrome (60764846706).

The spelling of 20434403304 in words is "twenty billion, four hundred thirty-four million, four hundred three thousand, three hundred four".