23021311544 has 128 divisors (see below), whose sum is σ = 56816640000. Its totient is φ = 8472055680.

The previous prime is 23021311531. The next prime is 23021311559. The reversal of 23021311544 is 44511312032.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4198997 + ... + 4204475.

It is an arithmetic number, because the mean of its divisors is an integer number (443880000).

Almost surely, 2^23021311544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23021311544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28408320000).

23021311544 is an abundant number, since it is smaller than the sum of its proper divisors (33795328456).

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

23021311544 is a wasteful number, since it uses less digits than its factorization.

23021311544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881 (or 5877 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 23021311544 its reverse (44511312032), we get a palindrome (67532623576).

The spelling of 23021311544 in words is "twenty-three billion, twenty-one million, three hundred eleven thousand, five hundred forty-four".