20010902 has 4 divisors (see below), whose sum is σ = 30016356. Its totient is φ = 10005450.

The previous prime is 20010889. The next prime is 20010917. The reversal of 20010902 is 20901002.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002724 + ... + 5002727.

It is an arithmetic number, because the mean of its divisors is an integer number (7504089).

Almost surely, 2^20010902 is an apocalyptic number.

20010902 is a deficient number, since it is larger than the sum of its proper divisors (10005454).

20010902 is a wasteful number, since it uses less digits than its factorization.

20010902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005453.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20010902 is about 4473.3546695964. The cubic root of 20010902 is about 271.4910736687.

Adding to 20010902 its reverse (20901002), we get a palindrome (40911904).

The spelling of 20010902 in words is "twenty million, ten thousand, nine hundred two".