20423133144 has 48 divisors (see below), whose sum is σ = 55748209920. Its totient is φ = 6754104000.

The previous prime is 20423133113. The next prime is 20423133149. The reversal of 20423133144 is 44133132402.

20423133144 is a `hidden beast` number, since 204 + 2 + 313 + 3 + 144 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423133149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1107607 + ... + 1125894.

It is an arithmetic number, because the mean of its divisors is an integer number (1161421040).

Almost surely, 2^20423133144 is an apocalyptic number.

20423133144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20423133144 is an abundant number, since it is smaller than the sum of its proper divisors (35325076776).

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

20423133144 is a wasteful number, since it uses less digits than its factorization.

20423133144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233640 (or 2233633 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20423133144 its reverse (44133132402), we get a palindrome (64556265546).

The spelling of 20423133144 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-three thousand, one hundred forty-four".