20116615201 has 4 divisors (see below), whose sum is σ = 20765538304. Its totient is φ = 19467692100.

The previous prime is 20116615187. The next prime is 20116615217. The reversal of 20116615201 is 10251661102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20116615201 - 2¹³ = 20116607009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116615241) 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, 324461505 + ... + 324461566.

It is an arithmetic number, because the mean of its divisors is an integer number (5191384576).

Almost surely, 2^20116615201 is an apocalyptic number.

It is an amenable number.

20116615201 is a deficient number, since it is larger than the sum of its proper divisors (648923103).

20116615201 is an equidigital number, since it uses as much as digits as its factorization.

20116615201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648923102.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 20116615201 in words is "twenty billion, one hundred sixteen million, six hundred fifteen thousand, two hundred one".