20418708 has 48 divisors (see below), whose sum is σ = 49674240. Its totient is φ = 6520800.

The previous prime is 20418707. The next prime is 20418721. The reversal of 20418708 is 80781402.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20418701) 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, 48523 + ... + 48941.

It is an arithmetic number, because the mean of its divisors is an integer number (1034880).

Almost surely, 2^20418708 is an apocalyptic number.

It is an amenable number.

20418708 is an abundant number, since it is smaller than the sum of its proper divisors (29255532).

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

20418708 is a wasteful number, since it uses less digits than its factorization.

20418708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 586 counting only the distinct ones).

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

The square root of 20418708 is about 4518.7064520723. The cubic root of 20418708 is about 273.3229416368.

The spelling of 20418708 in words is "twenty million, four hundred eighteen thousand, seven hundred eight".