20131030542 has 48 divisors (see below), whose sum is σ = 48346301952. Its totient is φ = 5566181040.

The previous prime is 20131030529. The next prime is 20131030547. The reversal of 20131030542 is 24503013102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131030547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1095288 + ... + 1113515.

It is an arithmetic number, because the mean of its divisors is an integer number (1007214624).

Almost surely, 2^20131030542 is an apocalyptic number.

20131030542 is an abundant number, since it is smaller than the sum of its proper divisors (28215271410).

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

20131030542 is a wasteful number, since it uses less digits than its factorization.

20131030542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208853 (or 2208846 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20131030542 its reverse (24503013102), we get a palindrome (44634043644).

The spelling of 20131030542 in words is "twenty billion, one hundred thirty-one million, thirty thousand, five hundred forty-two".