20018794 has 8 divisors (see below), whose sum is σ = 30050208. Its totient is φ = 10002060.

The previous prime is 20018773. The next prime is 20018807. The reversal of 20018794 is 49781002.

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

It is a super-2 number, since 2×20018794² = 801504226428872, which contains 22 as substring.

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, 859 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (3756276).

Almost surely, 2^20018794 is an apocalyptic number.

20018794 is a deficient number, since it is larger than the sum of its proper divisors (10031414).

20018794 is a wasteful number, since it uses less digits than its factorization.

20018794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20018794 is about 4474.2366946777. The cubic root of 20018794 is about 271.5267596487.

Adding to 20018794 its reverse (49781002), we get a palindrome (69799796).

The spelling of 20018794 in words is "twenty million, eighteen thousand, seven hundred ninety-four".