20021804468 has 24 divisors (see below), whose sum is σ = 37120974912. Its totient is φ = 9416502144.

The previous prime is 20021804459. The next prime is 20021804471. The reversal of 20021804468 is 86440812002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31721 + ... + 202607.

It is an arithmetic number, because the mean of its divisors is an integer number (1546707288).

Almost surely, 2^20021804468 is an apocalyptic number.

It is an amenable number.

20021804468 is a deficient number, since it is larger than the sum of its proper divisors (17099170444).

20021804468 is a wasteful number, since it uses less digits than its factorization.

20021804468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172631 (or 172629 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The spelling of 20021804468 in words is "twenty billion, twenty-one million, eight hundred four thousand, four hundred sixty-eight".