20203146 has 12 divisors (see below), whose sum is σ = 43773522. Its totient is φ = 6734376.

The previous prime is 20203133. The next prime is 20203151. The reversal of 20203146 is 64130202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 622521 = 4425^2 + 789^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1122397 = 20203146 / (2 + 0 + 2 + 0 + 3 + 1 + 4 + 6).

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561181 + ... + 561216.

Almost surely, 2^20203146 is an apocalyptic number.

20203146 is an abundant number, since it is smaller than the sum of its proper divisors (23570376).

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

20203146 is a wasteful number, since it uses less digits than its factorization.

20203146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122405 (or 1122402 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20203146 is about 4494.7909851293. The cubic root of 20203146 is about 272.3577059191.

Adding to 20203146 its reverse (64130202), we get a palindrome (84333348).

The spelling of 20203146 in words is "twenty million, two hundred three thousand, one hundred forty-six".