201620041634 has 8 divisors (see below), whose sum is σ = 329923704528. Its totient is φ = 91645473460.

The previous prime is 201620041613. The next prime is 201620041639. The reversal of 201620041634 is 436140026102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201620041597 and 201620041606.

It is not an unprimeable number, because it can be changed into a prime (201620041639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4582273652 + ... + 4582273695.

It is an arithmetic number, because the mean of its divisors is an integer number (41240463066).

Almost surely, 2^201620041634 is an apocalyptic number.

201620041634 is a deficient number, since it is larger than the sum of its proper divisors (128303662894).

201620041634 is a wasteful number, since it uses less digits than its factorization.

201620041634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9164547360.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 201620041634 its reverse (436140026102), we get a palindrome (637760067736).

The spelling of 201620041634 in words is "two hundred one billion, six hundred twenty million, forty-one thousand, six hundred thirty-four".