20516698 has 4 divisors (see below), whose sum is σ = 30775050. Its totient is φ = 10258348.

The previous prime is 20516693. The next prime is 20516707. The reversal of 20516698 is 89661502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12581209 + 7935489 = 3547^2 + 2817^2 .

It is not an unprimeable number, because it can be changed into a prime (20516693) by changing a digit.

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 as a sum of consecutive naturals, namely, 5129173 + ... + 5129176.

Almost surely, 2^20516698 is an apocalyptic number.

20516698 is a deficient number, since it is larger than the sum of its proper divisors (10258352).

20516698 is a wasteful number, since it uses less digits than its factorization.

20516698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258351.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20516698 is about 4529.5361793455. The cubic root of 20516698 is about 273.7594724383.

The spelling of 20516698 in words is "twenty million, five hundred sixteen thousand, six hundred ninety-eight".