20146938 has 96 divisors (see below), whose sum is σ = 51710400. Its totient is φ = 5193216.

The previous prime is 20146927. The next prime is 20146961. The reversal of 20146938 is 83964102.

It is a super-2 number, since 2×20146938² = 811798221551688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20146899 and 20146908.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144873 + ... + 145011.

It is an arithmetic number, because the mean of its divisors is an integer number (538650).

Almost surely, 2^20146938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20146938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25855200).

20146938 is an abundant number, since it is smaller than the sum of its proper divisors (31563462).

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

20146938 is a wasteful number, since it uses less digits than its factorization.

20146938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20146938 is about 4488.5340591333. The cubic root of 20146938 is about 272.1048921430.

The spelling of 20146938 in words is "twenty million, one hundred forty-six thousand, nine hundred thirty-eight".