20315035043 has 4 divisors (see below), whose sum is σ = 20316245040. Its totient is φ = 20313825048.

The previous prime is 20315035031. The next prime is 20315035067. The reversal of 20315035043 is 34053051302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20315035043 - 2¹⁸ = 20314772899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315031043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579455 + ... + 613512.

It is an arithmetic number, because the mean of its divisors is an integer number (5079061260).

Almost surely, 2^20315035043 is an apocalyptic number.

20315035043 is a deficient number, since it is larger than the sum of its proper divisors (1209997).

20315035043 is a wasteful number, since it uses less digits than its factorization.

20315035043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209996.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20315035043 its reverse (34053051302), we get a palindrome (54368086345).

The spelling of 20315035043 in words is "twenty billion, three hundred fifteen million, thirty-five thousand, forty-three".