20416430544 has 80 divisors (see below), whose sum is σ = 56142388800. Its totient is φ = 6374827008.

The previous prime is 20416430537. The next prime is 20416430569. The reversal of 20416430544 is 44503461402.

It is a happy number.

It is a super-2 number, since 2×20416430544² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 44599 + ... + 206934.

It is an arithmetic number, because the mean of its divisors is an integer number (701779860).

Almost surely, 2^20416430544 is an apocalyptic number.

20416430544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20416430544 is an abundant number, since it is smaller than the sum of its proper divisors (35725958256).

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

20416430544 is a wasteful number, since it uses less digits than its factorization.

20416430544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251652 (or 251646 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 20416430544 its reverse (44503461402), we get a palindrome (64919891946).

The spelling of 20416430544 in words is "twenty billion, four hundred sixteen million, four hundred thirty thousand, five hundred forty-four".