20413658238 has 16 divisors (see below), whose sum is σ = 41695983360. Its totient is φ = 6659774936.

The previous prime is 20413658233. The next prime is 20413658261. The reversal of 20413658238 is 83285631402.

It is a self number, because there is not a number n which added to its sum of digits gives 20413658238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413658233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36194148 + ... + 36194711.

It is an arithmetic number, because the mean of its divisors is an integer number (2605998960).

Almost surely, 2^20413658238 is an apocalyptic number.

20413658238 is an abundant number, since it is smaller than the sum of its proper divisors (21282325122).

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

20413658238 is a wasteful number, since it uses less digits than its factorization.

20413658238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72388911.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 20413658238 in words is "twenty billion, four hundred thirteen million, six hundred fifty-eight thousand, two hundred thirty-eight".