20066542240 has 48 divisors (see below), whose sum is σ = 47473413120. Its totient is φ = 8015407360.

The previous prime is 20066542189. The next prime is 20066542253. The reversal of 20066542240 is 4224566002.

It is a super-2 number, since 2×20066542240² (a number of 21 digits) contains 22 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 in 7 ways as a sum of consecutive naturals, for example, 27825 + ... + 202255.

It is an arithmetic number, because the mean of its divisors is an integer number (989029440).

Almost surely, 2^20066542240 is an apocalyptic number.

20066542240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20066542240 is an abundant number, since it is smaller than the sum of its proper divisors (27406870880).

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

20066542240 is a wasteful number, since it uses less digits than its factorization.

20066542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175165 (or 175157 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The spelling of 20066542240 in words is "twenty billion, sixty-six million, five hundred forty-two thousand, two hundred forty".