20748100105 has 8 divisors (see below), whose sum is σ = 24989595264. Its totient is φ = 16537230000.

The previous prime is 20748100103. The next prime is 20748100123. The reversal of 20748100105 is 50100184702.

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

It is not a de Polignac number, because 20748100105 - 2¹ = 20748100103 is a prime.

It is a super-2 number, since 2×20748100105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20748100103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7654771 + ... + 7657480.

It is an arithmetic number, because the mean of its divisors is an integer number (3123699408).

Almost surely, 2^20748100105 is an apocalyptic number.

It is an amenable number.

20748100105 is a deficient number, since it is larger than the sum of its proper divisors (4241495159).

20748100105 is a wasteful number, since it uses less digits than its factorization.

20748100105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15312527.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 20748100105 its reverse (50100184702), we get a palindrome (70848284807).

The spelling of 20748100105 in words is "twenty billion, seven hundred forty-eight million, one hundred thousand, one hundred five".