20531054142 has 12 divisors (see below), whose sum is σ = 44483950680. Its totient is φ = 6843684708.

The previous prime is 20531054129. The next prime is 20531054161. The reversal of 20531054142 is 24145013502.

20531054142 is a `hidden beast` number, since 20 + 53 + 10 + 541 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570307042 + ... + 570307077.

It is an arithmetic number, because the mean of its divisors is an integer number (3706995890).

Almost surely, 2^20531054142 is an apocalyptic number.

20531054142 is an abundant number, since it is smaller than the sum of its proper divisors (23952896538).

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

20531054142 is a wasteful number, since it uses less digits than its factorization.

20531054142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140614127 (or 1140614124 counting only the distinct ones).

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

Adding to 20531054142 its reverse (24145013502), we get a palindrome (44676067644).

The spelling of 20531054142 in words is "twenty billion, five hundred thirty-one million, fifty-four thousand, one hundred forty-two".