23210464640 has 128 divisors (see below), whose sum is σ = 60969888000. Its totient is φ = 8379095040.

The previous prime is 23210464637. The next prime is 23210464703. The reversal of 23210464640 is 4646401232.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 23210464597 and 23210464606.

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, 966701 + ... + 990419.

It is an arithmetic number, because the mean of its divisors is an integer number (476327250).

Almost surely, 2^23210464640 is an apocalyptic number.

23210464640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23210464640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30484944000).

23210464640 is an abundant number, since it is smaller than the sum of its proper divisors (37759423360).

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

23210464640 is a wasteful number, since it uses less digits than its factorization.

23210464640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23888 (or 23876 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 23210464640 its reverse (4646401232), we get a palindrome (27856865872).

The spelling of 23210464640 in words is "twenty-three billion, two hundred ten million, four hundred sixty-four thousand, six hundred forty".