20016810 has 48 divisors (see below), whose sum is σ = 56777760. Its totient is φ = 4852320.

The previous prime is 20016791. The next prime is 20016827. The reversal of 20016810 is 1861002.

It is a super-2 number, since 2×20016810² = 801345365152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9120 + ... + 11099.

It is an arithmetic number, because the mean of its divisors is an integer number (1182870).

Almost surely, 2^20016810 is an apocalyptic number.

20016810 is an abundant number, since it is smaller than the sum of its proper divisors (36760950).

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

20016810 is a wasteful number, since it uses less digits than its factorization.

20016810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20243 (or 20240 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 20016810 is about 4474.0149753884. The cubic root of 20016810 is about 271.5177892966.

Adding to 20016810 its reverse (1861002), we get a palindrome (21877812).

It can be divided in two parts, 2001 and 6810, that multiplied together give a triangular number (13626810 = T₅₂₂₀).

The spelling of 20016810 in words is "twenty million, sixteen thousand, eight hundred ten".