20700105 has 8 divisors (see below), whose sum is σ = 33120192. Its totient is φ = 11040048.

The previous prime is 20700103. The next prime is 20700109. The reversal of 20700105 is 50100702.

It is a happy number.

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

It is not a de Polignac number, because 20700105 - 2¹ = 20700103 is a prime.

It is a super-2 number, since 2×20700105² = 856988694022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1380007 = 20700105 / (2 + 0 + 7 + 0 + 0 + 1 + 0 + 5).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20700103) 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, 689989 + ... + 690018.

It is an arithmetic number, because the mean of its divisors is an integer number (4140024).

Almost surely, 2^20700105 is an apocalyptic number.

It is an amenable number.

20700105 is a deficient number, since it is larger than the sum of its proper divisors (12420087).

20700105 is a wasteful number, since it uses less digits than its factorization.

20700105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380015.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 20700105 is about 4549.7368055746. The cubic root of 20700105 is about 274.5728022797.

Adding to 20700105 its reverse (50100702), we get a palindrome (70800807).

The spelling of 20700105 in words is "twenty million, seven hundred thousand, one hundred five".