20049637979 has 8 divisors (see below), whose sum is σ = 22928125920. Its totient is φ = 17174713536.

The previous prime is 20049637961. The next prime is 20049637999. The reversal of 20049637979 is 97973694002.

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

It is a cyclic number.

It is not a de Polignac number, because 20049637979 - 2¹² = 20049633883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20049637999) 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, 878804 + ... + 901329.

It is an arithmetic number, because the mean of its divisors is an integer number (2866015740).

Almost surely, 2^20049637979 is an apocalyptic number.

20049637979 is a deficient number, since it is larger than the sum of its proper divisors (2878487941).

20049637979 is a wasteful number, since it uses less digits than its factorization.

20049637979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781749.

The product of its (nonzero) digits is 5143824, while the sum is 56.

The spelling of 20049637979 in words is "twenty billion, forty-nine million, six hundred thirty-seven thousand, nine hundred seventy-nine".