20845843504 has 10 divisors (see below), whose sum is σ = 40388821820. Its totient is φ = 10422921744.

The previous prime is 20845843433. The next prime is 20845843511. The reversal of 20845843504 is 40534854802.

It is a happy number.

It is a super-3 number, since 3×20845843504³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651432594 + ... + 651432625.

It is an arithmetic number, because the mean of its divisors is an integer number (4038882182).

Almost surely, 2^20845843504 is an apocalyptic number.

It is an amenable number.

20845843504 is a deficient number, since it is larger than the sum of its proper divisors (19542978316).

20845843504 is a wasteful number, since it uses less digits than its factorization.

20845843504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302865227 (or 1302865221 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 43.

The spelling of 20845843504 in words is "twenty billion, eight hundred forty-five million, eight hundred forty-three thousand, five hundred four".