20707055 has 8 divisors (see below), whose sum is σ = 26156400. Its totient is φ = 15693696.

The previous prime is 20707051. The next prime is 20707067. The reversal of 20707055 is 55070702.

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

It is not a de Polignac number, because 20707055 - 2² = 20707051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20707051) 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 7 ways as a sum of consecutive naturals, for example, 108890 + ... + 109079.

It is an arithmetic number, because the mean of its divisors is an integer number (3269550).

Almost surely, 2^20707055 is an apocalyptic number.

20707055 is a deficient number, since it is larger than the sum of its proper divisors (5449345).

20707055 is a wasteful number, since it uses less digits than its factorization.

20707055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217993.

The product of its (nonzero) digits is 2450, while the sum is 26.

The square root of 20707055 is about 4550.5005219206. The cubic root of 20707055 is about 274.6035278476.

Adding to 20707055 its reverse (55070702), we get a palindrome (75777757).

It can be divided in two parts, 2070705 and 5, that multiplied together give a triangular number (10353525 = T₄₅₅₀).

The spelling of 20707055 in words is "twenty million, seven hundred seven thousand, fifty-five".