20214018 has 36 divisors (see below), whose sum is σ = 48145734. Its totient is φ = 6124800.

The previous prime is 20214017. The next prime is 20214023. The reversal of 20214018 is 81041202.

It can be written as a sum of positive squares in only one way, i.e., 13417569 + 6796449 = 3663^2 + 2607^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20214013) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2463 + ... + 6818.

Almost surely, 2^20214018 is an apocalyptic number.

20214018 is an abundant number, since it is smaller than the sum of its proper divisors (27931716).

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

20214018 is a wasteful number, since it uses less digits than its factorization.

20214018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311 (or 9297 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20214018 is about 4496.0002224199. Note that the first 3 decimals coincide. The cubic root of 20214018 is about 272.4065521398.

The spelling of 20214018 in words is "twenty million, two hundred fourteen thousand, eighteen".