20501047049 has 8 divisors (see below), whose sum is σ = 23488788288. Its totient is φ = 17528060880.

The previous prime is 20501047043. The next prime is 20501047117. The reversal of 20501047049 is 94074010502.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20501047049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20501047043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3685787 + ... + 3691344.

It is an arithmetic number, because the mean of its divisors is an integer number (2936098536).

Almost surely, 2^20501047049 is an apocalyptic number.

It is an amenable number.

20501047049 is a deficient number, since it is larger than the sum of its proper divisors (2987741239).

20501047049 is an equidigital number, since it uses as much as digits as its factorization.

20501047049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377535.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 20501047049 in words is "twenty billion, five hundred one million, forty-seven thousand, forty-nine".