20867444884 has 24 divisors (see below), whose sum is σ = 42902300448. Its totient is φ = 8755571040.

The previous prime is 20867444881. The next prime is 20867444893. The reversal of 20867444884 is 48844476802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20867444881) 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 7 ways as a sum of consecutive naturals, for example, 18240202 + ... + 18241345.

It is an arithmetic number, because the mean of its divisors is an integer number (1787595852).

Almost surely, 2^20867444884 is an apocalyptic number.

It is an amenable number.

20867444884 is an abundant number, since it is smaller than the sum of its proper divisors (22034855564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20867444884 is a wasteful number, since it uses less digits than its factorization.

20867444884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36481575 (or 36481573 counting only the distinct ones).

The product of its (nonzero) digits is 11010048, while the sum is 55.

The spelling of 20867444884 in words is "twenty billion, eight hundred sixty-seven million, four hundred forty-four thousand, eight hundred eighty-four".