20437540578 has 96 divisors (see below), whose sum is σ = 54544404096. Its totient is φ = 5385740544.

The previous prime is 20437540561. The next prime is 20437540603. The reversal of 20437540578 is 87504573402.

20437540578 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 75 + 4 + 0 + 578 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2342901 + ... + 2351607.

It is an arithmetic number, because the mean of its divisors is an integer number (568170876).

Almost surely, 2^20437540578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20437540578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27272202048).

20437540578 is an abundant number, since it is smaller than the sum of its proper divisors (34106863518).

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

20437540578 is a wasteful number, since it uses less digits than its factorization.

20437540578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10168 (or 10165 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 20437540578 in words is "twenty billion, four hundred thirty-seven million, five hundred forty thousand, five hundred seventy-eight".