20813002 has 16 divisors (see below), whose sum is σ = 35743680. Its totient is φ = 8903808.

The previous prime is 20812993. The next prime is 20813003. The reversal of 20813002 is 20031802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20813003) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10074 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (2233980).

Almost surely, 2^20813002 is an apocalyptic number.

20813002 is a deficient number, since it is larger than the sum of its proper divisors (14930678).

20813002 is a wasteful number, since it uses less digits than its factorization.

20813002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20813002 is about 4562.1269162530. The cubic root of 20813002 is about 275.0710648296.

Adding to 20813002 its reverse (20031802), we get a palindrome (40844804).

The spelling of 20813002 in words is "twenty million, eight hundred thirteen thousand, two".