20735812 has 12 divisors (see below), whose sum is σ = 37539180. Its totient is φ = 10010336.

The previous prime is 20735809. The next prime is 20735849. The reversal of 20735812 is 21853702.

It can be written as a sum of positive squares in 2 ways, for example, as 12068676 + 8667136 = 3474^2 + 2944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89263 + ... + 89494.

It is an arithmetic number, because the mean of its divisors is an integer number (3128265).

Almost surely, 2^20735812 is an apocalyptic number.

It is an amenable number.

20735812 is a deficient number, since it is larger than the sum of its proper divisors (16803368).

20735812 is a wasteful number, since it uses less digits than its factorization.

20735812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178790 (or 178788 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20735812 is about 4553.6591879498. The cubic root of 20735812 is about 274.7305879392.

The spelling of 20735812 in words is "twenty million, seven hundred thirty-five thousand, eight hundred twelve".