20439941760 has 1280 divisors, whose sum is σ = 90995097600. Its totient is φ = 4269957120.

The previous prime is 20439941749. The next prime is 20439941777. The reversal of 20439941760 is 6714993402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 258733401 + ... + 258733479.

It is an arithmetic number, because the mean of its divisors is an integer number (71089920).

Almost surely, 2^20439941760 is an apocalyptic number.

20439941760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20439941760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45497548800).

20439941760 is an abundant number, since it is smaller than the sum of its proper divisors (70555155840).

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

20439941760 is a wasteful number, since it uses less digits than its factorization.

20439941760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 20439941760 in words is "twenty billion, four hundred thirty-nine million, nine hundred forty-one thousand, seven hundred sixty".