20632018 has 8 divisors (see below), whose sum is σ = 33761520. Its totient is φ = 9378180.

The previous prime is 20631991. The next prime is 20632037. The reversal of 20632018 is 81023602.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 937819 = 20632018 / (2 + 0 + 6 + 3 + 2 + 0 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 20632018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468888 + ... + 468931.

It is an arithmetic number, because the mean of its divisors is an integer number (4220190).

Almost surely, 2^20632018 is an apocalyptic number.

20632018 is a deficient number, since it is larger than the sum of its proper divisors (13129502).

20632018 is a wasteful number, since it uses less digits than its factorization.

20632018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937832.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20632018 is about 4542.2481218005. The cubic root of 20632018 is about 274.2714290417.

The spelling of 20632018 in words is "twenty million, six hundred thirty-two thousand, eighteen".