20436232280 has 16 divisors (see below), whose sum is σ = 45981522720. Its totient is φ = 8174492896.

The previous prime is 20436232213. The next prime is 20436232303. The reversal of 20436232280 is 8223263402.

It is a super-2 number, since 2×20436232280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255452864 + ... + 255452943.

It is an arithmetic number, because the mean of its divisors is an integer number (2873845170).

Almost surely, 2^20436232280 is an apocalyptic number.

20436232280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20436232280 is an abundant number, since it is smaller than the sum of its proper divisors (25545290440).

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

20436232280 is a wasteful number, since it uses less digits than its factorization.

20436232280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510905818 (or 510905814 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 20436232280 its reverse (8223263402), we get a palindrome (28659495682).

The spelling of 20436232280 in words is "twenty billion, four hundred thirty-six million, two hundred thirty-two thousand, two hundred eighty".