20372867871 has 16 divisors (see below), whose sum is σ = 27554588928. Its totient is φ = 13386643200.

The previous prime is 20372867869. The next prime is 20372867891. The reversal of 20372867871 is 17876827302.

It is a happy number.

It is not a de Polignac number, because 20372867871 - 2¹ = 20372867869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372867891) 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 15 ways as a sum of consecutive naturals, for example, 819951 + ... + 844431.

It is an arithmetic number, because the mean of its divisors is an integer number (1722161808).

Almost surely, 2^20372867871 is an apocalyptic number.

20372867871 is a deficient number, since it is larger than the sum of its proper divisors (7181721057).

20372867871 is a wasteful number, since it uses less digits than its factorization.

20372867871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28462.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 20372867871 in words is "twenty billion, three hundred seventy-two million, eight hundred sixty-seven thousand, eight hundred seventy-one".