20874018 has 32 divisors (see below), whose sum is σ = 47526912. Its totient is φ = 6050000.

The previous prime is 20874013. The next prime is 20874059. The reversal of 20874018 is 81047802.

It is not an unprimeable number, because it can be changed into a prime (20874013) by changing a digit.

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, 5358 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (1485216).

Almost surely, 2^20874018 is an apocalyptic number.

20874018 is an abundant number, since it is smaller than the sum of its proper divisors (26652894).

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

20874018 is a wasteful number, since it uses less digits than its factorization.

20874018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13790.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20874018 is about 4568.8092540617. The cubic root of 20874018 is about 275.3396046831.

It can be divided in two parts, 2087 and 4018, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 20874018 in words is "twenty million, eight hundred seventy-four thousand, eighteen".