23211544440 has 64 divisors (see below), whose sum is σ = 79582440960. Its totient is φ = 5305495680.

The previous prime is 23211544417. The next prime is 23211544453. The reversal of 23211544440 is 4444511232.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23211544398 and 23211544407.

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 15 ways as a sum of consecutive naturals, for example, 13815556 + ... + 13817235.

It is an arithmetic number, because the mean of its divisors is an integer number (1243475640).

Almost surely, 2^23211544440 is an apocalyptic number.

23211544440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23211544440 is an abundant number, since it is smaller than the sum of its proper divisors (56370896520).

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

23211544440 is a wasteful number, since it uses less digits than its factorization.

23211544440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27632812 (or 27632808 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The spelling of 23211544440 in words is "twenty-three billion, two hundred eleven million, five hundred forty-four thousand, four hundred forty".