20624431043 has 16 divisors (see below), whose sum is σ = 21292051200. Its totient is φ = 19969890336.

The previous prime is 20624431031. The next prime is 20624431081. The reversal of 20624431043 is 34013442602.

It is a cyclic number.

It is not a de Polignac number, because 20624431043 - 2⁴ = 20624431027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20624430997 and 20624431015.

It is not an unprimeable number, because it can be changed into a prime (20624431343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097321 + ... + 1115957.

It is an arithmetic number, because the mean of its divisors is an integer number (1330753200).

Almost surely, 2^20624431043 is an apocalyptic number.

20624431043 is a deficient number, since it is larger than the sum of its proper divisors (667620157).

20624431043 is a wasteful number, since it uses less digits than its factorization.

20624431043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18986.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20624431043 its reverse (34013442602), we get a palindrome (54637873645).

The spelling of 20624431043 in words is "twenty billion, six hundred twenty-four million, four hundred thirty-one thousand, forty-three".