20873424187 has 32 divisors (see below), whose sum is σ = 28061913600. Its totient is φ = 15033081600.

The previous prime is 20873424181. The next prime is 20873424199. The reversal of 20873424187 is 78142437802.

It is a cyclic number.

It is not a de Polignac number, because 20873424187 - 2⁷ = 20873424059 is a prime.

It is a super-2 number, since 2×20873424187² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20873424181) 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 31 ways as a sum of consecutive naturals, for example, 114012 + ... + 233977.

It is an arithmetic number, because the mean of its divisors is an integer number (876934800).

Almost surely, 2^20873424187 is an apocalyptic number.

20873424187 is a deficient number, since it is larger than the sum of its proper divisors (7188489413).

20873424187 is a wasteful number, since it uses less digits than its factorization.

20873424187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348067.

The product of its (nonzero) digits is 602112, while the sum is 46.

The spelling of 20873424187 in words is "twenty billion, eight hundred seventy-three million, four hundred twenty-four thousand, one hundred eighty-seven".