20902043049 has 8 divisors (see below), whose sum is σ = 27870273600. Its totient is φ = 13934253936.

The previous prime is 20902043027. The next prime is 20902043069. The reversal of 20902043049 is 94034020902.

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

It is not a de Polignac number, because 20902043049 - 2⁹ = 20902042537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20902043069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23227 + ... + 205775.

It is an arithmetic number, because the mean of its divisors is an integer number (3483784200).

Almost surely, 2^20902043049 is an apocalyptic number.

It is an amenable number.

20902043049 is a deficient number, since it is larger than the sum of its proper divisors (6968230551).

20902043049 is a wasteful number, since it uses less digits than its factorization.

20902043049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220719.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 20902043049 in words is "twenty billion, nine hundred two million, forty-three thousand, forty-nine".