20507055 has 8 divisors (see below), whose sum is σ = 32811312. Its totient is φ = 10937088.

The previous prime is 20507051. The next prime is 20507107. The reversal of 20507055 is 55070502.

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

It is not a de Polignac number, because 20507055 - 2² = 20507051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507051) 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, 683554 + ... + 683583.

It is an arithmetic number, because the mean of its divisors is an integer number (4101414).

Almost surely, 2^20507055 is an apocalyptic number.

20507055 is a deficient number, since it is larger than the sum of its proper divisors (12304257).

20507055 is a wasteful number, since it uses less digits than its factorization.

20507055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367145.

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20507055 is about 4528.4715964661. The cubic root of 20507055 is about 273.7165760572.

Adding to 20507055 its reverse (55070502), we get a palindrome (75577557).

The spelling of 20507055 in words is "twenty million, five hundred seven thousand, fifty-five".