20423011530544 has 20 divisors (see below), whose sum is σ = 45222382675024. Its totient is φ = 8752719227328.

The previous prime is 20423011530529. The next prime is 20423011530569. The reversal of 20423011530544 is 44503511032402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91174158507 + ... + 91174158730.

Almost surely, 2^{20423011530544} is an apocalyptic number.

It is an amenable number.

20423011530544 is an abundant number, since it is smaller than the sum of its proper divisors (24799371144480).

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

20423011530544 is a wasteful number, since it uses less digits than its factorization.

20423011530544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182348317252 (or 182348317246 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 20423011530544 its reverse (44503511032402), we get a palindrome (64926522562946).

The spelling of 20423011530544 in words is "twenty trillion, four hundred twenty-three billion, eleven million, five hundred thirty thousand, five hundred forty-four".