20280490443 has 6 divisors (see below), whose sum is σ = 29294041764. Its totient is φ = 13520326956.

The previous prime is 20280490441. The next prime is 20280490457. The reversal of 20280490443 is 34409408202.

20280490443 is a `hidden beast` number, since 202 + 8 + 0 + 4 + 9 + 0 + 443 = 666.

It is not a de Polignac number, because 20280490443 - 2¹ = 20280490441 is a prime.

It is a super-2 number, since 2×20280490443² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20280490398 and 20280490407.

It is not an unprimeable number, because it can be changed into a prime (20280490441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1126693905 + ... + 1126693922.

It is an arithmetic number, because the mean of its divisors is an integer number (4882340294).

Almost surely, 2^20280490443 is an apocalyptic number.

20280490443 is a deficient number, since it is larger than the sum of its proper divisors (9013551321).

20280490443 is a wasteful number, since it uses less digits than its factorization.

20280490443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253387833 (or 2253387830 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Adding to 20280490443 its reverse (34409408202), we get a palindrome (54689898645).

The spelling of 20280490443 in words is "twenty billion, two hundred eighty million, four hundred ninety thousand, four hundred forty-three".