20664050101 has 4 divisors (see below), whose sum is σ = 20730494304. Its totient is φ = 20597605900.

The previous prime is 20664050087. The next prime is 20664050107. The reversal of 20664050101 is 10105046602.

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 20664050101 - 2²³ = 20655661493 is a prime.

It is a super-2 number, since 2×20664050101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20664050107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33221635 + ... + 33222256.

It is an arithmetic number, because the mean of its divisors is an integer number (5182623576).

Almost surely, 2^20664050101 is an apocalyptic number.

It is an amenable number.

20664050101 is a deficient number, since it is larger than the sum of its proper divisors (66444203).

20664050101 is an equidigital number, since it uses as much as digits as its factorization.

20664050101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66444202.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 20664050101 its reverse (10105046602), we get a palindrome (30769096703).

The spelling of 20664050101 in words is "twenty billion, six hundred sixty-four million, fifty thousand, one hundred one".