20502207 has 16 divisors (see below), whose sum is σ = 33135360. Its totient is φ = 12425400.

The previous prime is 20502203. The next prime is 20502233. The reversal of 20502207 is 70220502.

It is a happy number.

It is not a de Polignac number, because 20502207 - 2² = 20502203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20502207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34219 + ... + 34812.

It is an arithmetic number, because the mean of its divisors is an integer number (2070960).

Almost surely, 2^20502207 is an apocalyptic number.

20502207 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20502207 is a deficient number, since it is larger than the sum of its proper divisors (12633153).

20502207 is a wasteful number, since it uses less digits than its factorization.

20502207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69051 (or 69045 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20502207 is about 4527.9362848874. The cubic root of 20502207 is about 273.6950049029.

Adding to 20502207 its reverse (70220502), we get a palindrome (90722709).

The spelling of 20502207 in words is "twenty million, five hundred two thousand, two hundred seven".