20468953472 has 64 divisors (see below), whose sum is σ = 44557516800. Its totient is φ = 9288921600.

The previous prime is 20468953471. The next prime is 20468953481. The reversal of 20468953472 is 27435986402.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 20468953472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20468953471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876929 + ... + 899967.

It is an arithmetic number, because the mean of its divisors is an integer number (696211200).

Almost surely, 2^20468953472 is an apocalyptic number.

20468953472 is a gapful number since it is divisible by the number (22) 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 20468953472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22278758400).

20468953472 is an abundant number, since it is smaller than the sum of its proper divisors (24088563328).

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

20468953472 is a wasteful number, since it uses less digits than its factorization.

20468953472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23695 (or 23683 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 20468953472 in words is "twenty billion, four hundred sixty-eight million, nine hundred fifty-three thousand, four hundred seventy-two".