20071601 has 12 divisors (see below), whose sum is σ = 22778112. Its totient is φ = 17655000.

The previous prime is 20071573. The next prime is 20071603. The reversal of 20071601 is 10617002.

It is a happy number.

It is not a de Polignac number, because 20071601 - 2¹⁰ = 20070577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20071601.

It is not an unprimeable number, because it can be changed into a prime (20071603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (1898176).

Almost surely, 2^20071601 is an apocalyptic number.

It is an amenable number.

20071601 is a deficient number, since it is larger than the sum of its proper divisors (2706511).

20071601 is a wasteful number, since it uses less digits than its factorization.

20071601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404 (or 5393 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 20071601 is about 4480.1340381734. The cubic root of 20071601 is about 271.7653008968.

Adding to 20071601 its reverse (10617002), we get a palindrome (30688603).

The spelling of 20071601 in words is "twenty million, seventy-one thousand, six hundred one".