20453031034440 has 128 divisors (see below), whose sum is σ = 62279040395520. Its totient is φ = 5372506137600.

The previous prime is 20453031034363. The next prime is 20453031034537. The reversal of 20453031034440 is 4443013035402.

It is a super-3 number, since 3×20453031034440³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8442270 + ... + 10591410.

It is an arithmetic number, because the mean of its divisors is an integer number (486555003090).

Almost surely, 2^{20453031034440} is an apocalyptic number.

20453031034440 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 20453031034440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31139520197760).

20453031034440 is an abundant number, since it is smaller than the sum of its proper divisors (41826009361080).

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

20453031034440 is a wasteful number, since it uses less digits than its factorization.

20453031034440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150343 (or 2150339 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 20453031034440 its reverse (4443013035402), we get a palindrome (24896044069842).

The spelling of 20453031034440 in words is "twenty trillion, four hundred fifty-three billion, thirty-one million, thirty-four thousand, four hundred forty".