20138616 has 48 divisors (see below), whose sum is σ = 56918160. Its totient is φ = 6420480.

The previous prime is 20138609. The next prime is 20138633. The reversal of 20138616 is 61683102.

It is a self number, because there is not a number n which added to its sum of digits gives 20138616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4425 + ... + 7736.

It is an arithmetic number, because the mean of its divisors is an integer number (1185795).

Almost surely, 2^20138616 is an apocalyptic number.

It is an amenable number.

20138616 is an abundant number, since it is smaller than the sum of its proper divisors (36779544).

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

20138616 is a wasteful number, since it uses less digits than its factorization.

20138616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12196 (or 12189 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20138616 is about 4487.6069346591. The cubic root of 20138616 is about 272.0674212914.

The spelling of 20138616 in words is "twenty million, one hundred thirty-eight thousand, six hundred sixteen".