20430545043 has 8 divisors (see below), whose sum is σ = 27242374288. Its totient is φ = 13619539584.

The previous prime is 20430544997. The next prime is 20430545111. The reversal of 20430545043 is 34054503402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20430545043 - 2²¹ = 20428447891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430545043.

It is not an unprimeable number, because it can be changed into a prime (20430545543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145546 + ... + 249087.

It is an arithmetic number, because the mean of its divisors is an integer number (3405296786).

Almost surely, 2^20430545043 is an apocalyptic number.

20430545043 is a deficient number, since it is larger than the sum of its proper divisors (6811829245).

20430545043 is a wasteful number, since it uses less digits than its factorization.

20430545043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411893.

The product of its (nonzero) digits is 28800, while the sum is 30.

The spelling of 20430545043 in words is "twenty billion, four hundred thirty million, five hundred forty-five thousand, forty-three".