20018696 has 8 divisors (see below), whose sum is σ = 37535070. Its totient is φ = 10009344.

The previous prime is 20018659. The next prime is 20018743. The reversal of 20018696 is 69681002.

It can be written as a sum of positive squares in only one way, i.e., 16728100 + 3290596 = 4090^2 + 1814^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251161 + ... + 1251176.

Almost surely, 2^20018696 is an apocalyptic number.

It is an amenable number.

20018696 is a deficient number, since it is larger than the sum of its proper divisors (17516374).

20018696 is a wasteful number, since it uses less digits than its factorization.

20018696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502343 (or 2502339 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20018696 is about 4474.2257430756. The cubic root of 20018696 is about 271.5263165706.

Adding to 20018696 its reverse (69681002), we get a palindrome (89699698).

The spelling of 20018696 in words is "twenty million, eighteen thousand, six hundred ninety-six".