201934138420 has 48 divisors (see below), whose sum is σ = 485962606080. Its totient is φ = 69045894144.

The previous prime is 201934138411. The next prime is 201934138433. The reversal of 201934138420 is 24831439102.

It is a self number, because there is not a number n which added to its sum of digits gives 201934138420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1913725 + ... + 2016484.

It is an arithmetic number, because the mean of its divisors is an integer number (10124220960).

Almost surely, 2^201934138420 is an apocalyptic number.

201934138420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201934138420 is an abundant number, since it is smaller than the sum of its proper divisors (284028467660).

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

201934138420 is a wasteful number, since it uses less digits than its factorization.

201934138420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930592 (or 3930590 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 201934138420 in words is "two hundred one billion, nine hundred thirty-four million, one hundred thirty-eight thousand, four hundred twenty".