20502501 has 32 divisors (see below), whose sum is σ = 30535680. Its totient is φ = 12182400.

The previous prime is 20502491. The next prime is 20502509. The reversal of 20502501 is 10520502.

It is not a de Polignac number, because 20502501 - 2⁹ = 20501989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72306 + ... + 72588.

It is an arithmetic number, because the mean of its divisors is an integer number (954240).

Almost surely, 2^20502501 is an apocalyptic number.

It is an amenable number.

20502501 is a deficient number, since it is larger than the sum of its proper divisors (10033179).

20502501 is a wasteful number, since it uses less digits than its factorization.

20502501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20502501 is about 4527.9687498922. The cubic root of 20502501 is about 273.6963131515.

The spelling of 20502501 in words is "twenty million, five hundred two thousand, five hundred one".