20516118 has 32 divisors (see below), whose sum is σ = 47028480. Its totient is φ = 5844960.

The previous prime is 20516107. The next prime is 20516123. The reversal of 20516118 is 81161502.

It is a super-2 number, since 2×20516118² = 841822195579848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27393 + ... + 28131.

It is an arithmetic number, because the mean of its divisors is an integer number (1469640).

Almost surely, 2^20516118 is an apocalyptic number.

20516118 is an abundant number, since it is smaller than the sum of its proper divisors (26512362).

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

20516118 is a wasteful number, since it uses less digits than its factorization.

20516118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 20516118 is about 4529.4721546776. The cubic root of 20516118 is about 273.7568927186.

The spelling of 20516118 in words is "twenty million, five hundred sixteen thousand, one hundred eighteen".