20632879929 has 4 divisors (see below), whose sum is σ = 27510506576. Its totient is φ = 13755253284.

The previous prime is 20632879919. The next prime is 20632879937. The reversal of 20632879929 is 92997823602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20632879929 - 2⁷ = 20632879801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20632879909) 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 3 ways as a sum of consecutive naturals, for example, 3438813319 + ... + 3438813324.

It is an arithmetic number, because the mean of its divisors is an integer number (6877626644).

Almost surely, 2^20632879929 is an apocalyptic number.

It is an amenable number.

20632879929 is a deficient number, since it is larger than the sum of its proper divisors (6877626647).

20632879929 is an equidigital number, since it uses as much as digits as its factorization.

20632879929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6877626646.

The product of its (nonzero) digits is 5878656, while the sum is 57.

The spelling of 20632879929 in words is "twenty billion, six hundred thirty-two million, eight hundred seventy-nine thousand, nine hundred twenty-nine".