20740218 has 8 divisors (see below), whose sum is σ = 41480448. Its totient is φ = 6913404.

The previous prime is 20740217. The next prime is 20740241. The reversal of 20740218 is 81204702.

It is a sphenic number, since it is the product of 3 distinct primes.

20740218 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20740217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728346 + ... + 1728357.

It is an arithmetic number, because the mean of its divisors is an integer number (5185056).

Almost surely, 2^20740218 is an apocalyptic number.

20740218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20740218 is a wasteful number, since it uses less digits than its factorization.

20740218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456708.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20740218 is about 4554.1429490081. The cubic root of 20740218 is about 274.7500450543.

The spelling of 20740218 in words is "twenty million, seven hundred forty thousand, two hundred eighteen".