20502107 has 8 divisors (see below), whose sum is σ = 21115536. Its totient is φ = 19891872.

The previous prime is 20502071. The next prime is 20502109. The reversal of 20502107 is 70120502.

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

It is a cyclic number.

It is not a de Polignac number, because 20502107 - 2²² = 16307803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20502109) 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, 19733 + ... + 20745.

It is an arithmetic number, because the mean of its divisors is an integer number (2639442).

Almost surely, 2^20502107 is an apocalyptic number.

20502107 is a deficient number, since it is larger than the sum of its proper divisors (613429).

20502107 is a wasteful number, since it uses less digits than its factorization.

20502107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 20502107 is about 4527.9252423157. The cubic root of 20502107 is about 273.6945599176.

Adding to 20502107 its reverse (70120502), we get a palindrome (90622609).

The spelling of 20502107 in words is "twenty million, five hundred two thousand, one hundred seven".