20132690838 has 16 divisors (see below), whose sum is σ = 43362718896. Its totient is φ = 6194674080.

The previous prime is 20132690821. The next prime is 20132690839. The reversal of 20132690838 is 83809623102.

It is a self number, because there is not a number n which added to its sum of digits gives 20132690838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132690839) 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, 129055633 + ... + 129055788.

It is an arithmetic number, because the mean of its divisors is an integer number (2710169931).

Almost surely, 2^20132690838 is an apocalyptic number.

20132690838 is an abundant number, since it is smaller than the sum of its proper divisors (23230028058).

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

20132690838 is a wasteful number, since it uses less digits than its factorization.

20132690838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258111439.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 20132690838 in words is "twenty billion, one hundred thirty-two million, six hundred ninety thousand, eight hundred thirty-eight".