20238946 has 32 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 7871040.

The previous prime is 20238937. The next prime is 20238973. The reversal of 20238946 is 64983202.

It is a super-2 number, since 2×20238946² = 819229870381832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10191 + ... + 12013.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^20238946 is an apocalyptic number.

20238946 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20238946 is a deficient number, since it is larger than the sum of its proper divisors (17758622).

20238946 is a wasteful number, since it uses less digits than its factorization.

20238946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20238946 is about 4498.7716101176. The cubic root of 20238946 is about 272.5184837222.

The spelling of 20238946 in words is "twenty million, two hundred thirty-eight thousand, nine hundred forty-six".