20535142140 has 96 divisors (see below), whose sum is σ = 65948037120. Its totient is φ = 5299387200.

The previous prime is 20535142123. The next prime is 20535142151. The reversal of 20535142140 is 4124153502.

20535142140 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 514 + 2 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596616 + ... + 630095.

It is an arithmetic number, because the mean of its divisors is an integer number (686958720).

Almost surely, 2^20535142140 is an apocalyptic number.

20535142140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20535142140 is an abundant number, since it is smaller than the sum of its proper divisors (45412894980).

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

20535142140 is a wasteful number, since it uses less digits than its factorization.

20535142140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226760 (or 1226752 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20535142140 its reverse (4124153502), we get a palindrome (24659295642).

The spelling of 20535142140 in words is "twenty billion, five hundred thirty-five million, one hundred forty-two thousand, one hundred forty".