20040442542 has 48 divisors (see below), whose sum is σ = 43619651712. Its totient is φ = 6649641360.

The previous prime is 20040442531. The next prime is 20040442573. The reversal of 20040442542 is 24524404002.

20040442542 is a `hidden beast` number, since 2 + 0 + 0 + 404 + 4 + 254 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5075413 + ... + 5079359.

It is an arithmetic number, because the mean of its divisors is an integer number (908742744).

Almost surely, 2^20040442542 is an apocalyptic number.

20040442542 is an abundant number, since it is smaller than the sum of its proper divisors (23579209170).

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

20040442542 is a wasteful number, since it uses less digits than its factorization.

20040442542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173 (or 5170 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

Adding to 20040442542 its reverse (24524404002), we get a palindrome (44564846544).

The spelling of 20040442542 in words is "twenty billion, forty million, four hundred forty-two thousand, five hundred forty-two".