20430460542 has 32 divisors (see below), whose sum is σ = 41112852480. Its totient is φ = 6768231680.

The previous prime is 20430460499. The next prime is 20430460553. The reversal of 20430460542 is 24506403402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325134 + ... + 1340462.

It is an arithmetic number, because the mean of its divisors is an integer number (1284776640).

Almost surely, 2^20430460542 is an apocalyptic number.

20430460542 is an abundant number, since it is smaller than the sum of its proper divisors (20682391938).

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

20430460542 is a wasteful number, since it uses less digits than its factorization.

20430460542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16688.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 20430460542 its reverse (24506403402), we get a palindrome (44936863944).

The spelling of 20430460542 in words is "twenty billion, four hundred thirty million, four hundred sixty thousand, five hundred forty-two".