20860224 has 224 divisors, whose sum is σ = 73737216. Its totient is φ = 5038080.

The previous prime is 20860211. The next prime is 20860247. The reversal of 20860224 is 42206802.

It is a tau number, because it is divible by the number of its divisors (224).

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

It is a junction number, because it is equal to n+sod(n) for n = 20860194 and 20860203.

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 31 ways as a sum of consecutive naturals, for example, 251287 + ... + 251369.

It is an arithmetic number, because the mean of its divisors is an integer number (329184).

Almost surely, 2^20860224 is an apocalyptic number.

20860224 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 20860224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36868608).

20860224 is an abundant number, since it is smaller than the sum of its proper divisors (52876992).

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

20860224 is a wasteful number, since it uses less digits than its factorization.

20860224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 123 counting only the distinct ones).

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

The square root of 20860224 is about 4567.2994208832. The cubic root of 20860224 is about 275.2789412079.

The spelling of 20860224 in words is "twenty million, eight hundred sixty thousand, two hundred twenty-four".