20551030443 has 24 divisors (see below), whose sum is σ = 30220291296. Its totient is φ = 13455052800.

The previous prime is 20551030429. The next prime is 20551030517. The reversal of 20551030443 is 34403015502.

20551030443 is a `hidden beast` number, since 205 + 5 + 10 + 3 + 0 + 443 = 666.

It is not a de Polignac number, because 20551030443 - 2²⁸ = 20282594987 is a prime.

It is a super-2 number, since 2×20551030443² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20551030243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101653 + ... + 226793.

It is an arithmetic number, because the mean of its divisors is an integer number (1259178804).

Almost surely, 2^20551030443 is an apocalyptic number.

20551030443 is a deficient number, since it is larger than the sum of its proper divisors (9669260853).

20551030443 is a wasteful number, since it uses less digits than its factorization.

20551030443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125475 (or 125472 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20551030443 its reverse (34403015502), we get a palindrome (54954045945).

The spelling of 20551030443 in words is "twenty billion, five hundred fifty-one million, thirty thousand, four hundred forty-three".