20823674455140 has 144 divisors (see below), whose sum is σ = 61669491787008. Its totient is φ = 5249352987648.

The previous prime is 20823674455079. The next prime is 20823674455189. The reversal of 20823674455140 is 4155447632802.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8990364 + ... + 11066796.

It is an arithmetic number, because the mean of its divisors is an integer number (428260359632).

Almost surely, 2^{20823674455140} is an apocalyptic number.

20823674455140 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 20823674455140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30834745893504).

20823674455140 is an abundant number, since it is smaller than the sum of its proper divisors (40845817331868).

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

20823674455140 is a wasteful number, since it uses less digits than its factorization.

20823674455140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076946 (or 2076925 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 51.

The spelling of 20823674455140 in words is "twenty trillion, eight hundred twenty-three billion, six hundred seventy-four million, four hundred fifty-five thousand, one hundred forty".