20321876507 has 4 divisors (see below), whose sum is σ = 20446550760. Its totient is φ = 20197202256.

The previous prime is 20321876459. The next prime is 20321876513. The reversal of 20321876507 is 70567812302.

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 20321876507 - 2²⁰ = 20320827931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321876567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62336882 + ... + 62337207.

It is an arithmetic number, because the mean of its divisors is an integer number (5111637690).

Almost surely, 2^20321876507 is an apocalyptic number.

20321876507 is a deficient number, since it is larger than the sum of its proper divisors (124674253).

20321876507 is a wasteful number, since it uses less digits than its factorization.

20321876507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124674252.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 20321876507 in words is "twenty billion, three hundred twenty-one million, eight hundred seventy-six thousand, five hundred seven".