20812344 has 96 divisors (see below), whose sum is σ = 61787520. Its totient is φ = 5721408.

The previous prime is 20812303. The next prime is 20812357. The reversal of 20812344 is 44321802.

20812344 = T₄₈₉ + T₄₉₀ + ... + T₆₂₂.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310599 + ... + 310665.

It is an arithmetic number, because the mean of its divisors is an integer number (643620).

Almost surely, 2^20812344 is an apocalyptic number.

20812344 is a gapful number since it is divisible by the number (24) 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 20812344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30893760).

20812344 is an abundant number, since it is smaller than the sum of its proper divisors (40975176).

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

20812344 is a wasteful number, since it uses less digits than its factorization.

20812344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20812344 is about 4562.0548001969. The cubic root of 20812344 is about 275.0681660220.

The spelling of 20812344 in words is "twenty million, eight hundred twelve thousand, three hundred forty-four".