20696818 has 8 divisors (see below), whose sum is σ = 31631148. Its totient is φ = 10153104.

The previous prime is 20696777. The next prime is 20696827. The reversal of 20696818 is 81869602.

It can be written as a sum of positive squares in 2 ways, for example, as 20675209 + 21609 = 4547^2 + 147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 97521 + ... + 97732.

Almost surely, 2^20696818 is an apocalyptic number.

20696818 is a deficient number, since it is larger than the sum of its proper divisors (10934330).

20696818 is a wasteful number, since it uses less digits than its factorization.

20696818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195308.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20696818 is about 4549.3755615469. The cubic root of 20696818 is about 274.5582682378.

The spelling of 20696818 in words is "twenty million, six hundred ninety-six thousand, eight hundred eighteen".