20810146 has 16 divisors (see below), whose sum is σ = 35835840. Its totient is φ = 8878320.

The previous prime is 20810129. The next prime is 20810177. The reversal of 20810146 is 64101802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (2239740).

Almost surely, 2^20810146 is an apocalyptic number.

20810146 is a deficient number, since it is larger than the sum of its proper divisors (15025694).

20810146 is a wasteful number, since it uses less digits than its factorization.

20810146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20810146 is about 4561.8138936173. The cubic root of 20810146 is about 275.0584823279.

Adding to 20810146 its reverse (64101802), we get a palindrome (84911948).

The spelling of 20810146 in words is "twenty million, eight hundred ten thousand, one hundred forty-six".