20453513344 has 64 divisors (see below), whose sum is σ = 44594506080. Its totient is φ = 9267148800.

The previous prime is 20453513323. The next prime is 20453513369. The reversal of 20453513344 is 44331535402.

It is a happy number.

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

It is a super-2 number, since 2×20453513344² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417499 + ... + 463909.

Almost surely, 2^20453513344 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 20453513344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22297253040).

20453513344 is an abundant number, since it is smaller than the sum of its proper divisors (24140992736).

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

20453513344 is a wasteful number, since it uses less digits than its factorization.

20453513344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46749 (or 46737 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

The spelling of 20453513344 in words is "twenty billion, four hundred fifty-three million, five hundred thirteen thousand, three hundred forty-four".