20874220 has 24 divisors (see below), whose sum is σ = 43923600. Its totient is φ = 8332992.

The previous prime is 20874211. The next prime is 20874223. The reversal of 20874220 is 2247802.

It is not an unprimeable number, because it can be changed into a prime (20874223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15951 + ... + 17209.

It is an arithmetic number, because the mean of its divisors is an integer number (1830150).

Almost surely, 2^20874220 is an apocalyptic number.

20874220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20874220 is an abundant number, since it is smaller than the sum of its proper divisors (23049380).

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

20874220 is a wasteful number, since it uses less digits than its factorization.

20874220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097 (or 2095 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20874220 is about 4568.8313604247. The cubic root of 20874220 is about 275.3404928434.

The spelling of 20874220 in words is "twenty million, eight hundred seventy-four thousand, two hundred twenty".