20439442084 has 12 divisors (see below), whose sum is σ = 35891104284. Its totient is φ = 10184840864.

The previous prime is 20439442027. The next prime is 20439442097. The reversal of 20439442084 is 48024493402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11605321984 + 8834120100 = 107728^2 + 93990^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8718727 + ... + 8721070.

It is an arithmetic number, because the mean of its divisors is an integer number (2990925357).

Almost surely, 2^20439442084 is an apocalyptic number.

It is an amenable number.

20439442084 is a deficient number, since it is larger than the sum of its proper divisors (15451662200).

20439442084 is a wasteful number, since it uses less digits than its factorization.

20439442084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17440094 (or 17440092 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 20439442084 in words is "twenty billion, four hundred thirty-nine million, four hundred forty-two thousand, eighty-four".