20873400 has 96 divisors (see below), whose sum is σ = 68150400. Its totient is φ = 5270400.

The previous prime is 20873393. The next prime is 20873423. The reversal of 20873400 is 437802.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10485 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (709900).

Almost surely, 2^20873400 is an apocalyptic number.

20873400 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 20873400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34075200).

20873400 is an abundant number, since it is smaller than the sum of its proper divisors (47277000).

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

20873400 is a wasteful number, since it uses less digits than its factorization.

20873400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869 (or 1860 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20873400 is about 4568.7416210593. The cubic root of 20873400 is about 275.3368874047.

The spelling of 20873400 in words is "twenty million, eight hundred seventy-three thousand, four hundred".