20434320416 has 48 divisors (see below), whose sum is σ = 42621344640. Its totient is φ = 9610552320.

The previous prime is 20434320397. The next prime is 20434320421. The reversal of 20434320416 is 61402343402.

It is a super-2 number, since 2×20434320416² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012181 + ... + 1032171.

It is an arithmetic number, because the mean of its divisors is an integer number (887944680).

Almost surely, 2^20434320416 is an apocalyptic number.

It is an amenable number.

20434320416 is an abundant number, since it is smaller than the sum of its proper divisors (22187024224).

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

20434320416 is a wasteful number, since it uses less digits than its factorization.

20434320416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21897 (or 21889 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20434320416 its reverse (61402343402), we get a palindrome (81836663818).

The spelling of 20434320416 in words is "twenty billion, four hundred thirty-four million, three hundred twenty thousand, four hundred sixteen".