20874280 has 32 divisors (see below), whose sum is σ = 53677440. Its totient is φ = 7156800.

The previous prime is 20874257. The next prime is 20874299. The reversal of 20874280 is 8247802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36996 + ... + 37555.

It is an arithmetic number, because the mean of its divisors is an integer number (1677420).

Almost surely, 2^20874280 is an apocalyptic number.

20874280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20874280 is an abundant number, since it is smaller than the sum of its proper divisors (32803160).

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

20874280 is a wasteful number, since it uses less digits than its factorization.

20874280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74569 (or 74565 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 20874280 is about 4568.8379266505. The cubic root of 20874280 is about 275.3407566522.

The spelling of 20874280 in words is "twenty million, eight hundred seventy-four thousand, two hundred eighty".