20803146 has 48 divisors (see below), whose sum is σ = 52131744. Its totient is φ = 5485536.

The previous prime is 20803141. The next prime is 20803163. The reversal of 20803146 is 64130802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20803141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1101 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (1086078).

Almost surely, 2^20803146 is an apocalyptic number.

20803146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20803146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26065872).

20803146 is an abundant number, since it is smaller than the sum of its proper divisors (31328598).

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

20803146 is a wasteful number, since it uses less digits than its factorization.

20803146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475 (or 5468 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20803146 is about 4561.0465904220. The cubic root of 20803146 is about 275.0276379936.

Adding to 20803146 its reverse (64130802), we get a palindrome (84933948).

The spelling of 20803146 in words is "twenty million, eight hundred three thousand, one hundred forty-six".