20503102 has 4 divisors (see below), whose sum is σ = 30754656. Its totient is φ = 10251550.

The previous prime is 20503099. The next prime is 20503111. The reversal of 20503102 is 20130502.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5125774 + ... + 5125777.

It is an arithmetic number, because the mean of its divisors is an integer number (7688664).

Almost surely, 2^20503102 is an apocalyptic number.

20503102 is a deficient number, since it is larger than the sum of its proper divisors (10251554).

20503102 is a wasteful number, since it uses less digits than its factorization.

20503102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10251553.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20503102 is about 4528.0351147048. The cubic root of 20503102 is about 273.6989874574.

Adding to 20503102 its reverse (20130502), we get a palindrome (40633604).

The spelling of 20503102 in words is "twenty million, five hundred three thousand, one hundred two".