20000902 has 4 divisors (see below), whose sum is σ = 30001356. Its totient is φ = 10000450.

The previous prime is 20000879. The next prime is 20000909. The reversal of 20000902 is 20900002.

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

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000224 + ... + 5000227.

It is an arithmetic number, because the mean of its divisors is an integer number (7500339).

Almost surely, 2^20000902 is an apocalyptic number.

20000902 is a deficient number, since it is larger than the sum of its proper divisors (10000454).

20000902 is a wasteful number, since it uses less digits than its factorization.

20000902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000453.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20000902 is about 4472.2368005283. The cubic root of 20000902 is about 271.4458422726.

Adding to 20000902 its reverse (20900002), we get a palindrome (40900904).

It can be divided in two parts, 20000 and 902, that added together give a palindrome (20902).

The spelling of 20000902 in words is "twenty million, nine hundred two", and thus it is an aban number.