20102002 has 4 divisors (see below), whose sum is σ = 30153006. Its totient is φ = 10051000.

The previous prime is 20101997. The next prime is 20102003. The reversal of 20102002 is 20020102.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 19018321 + 1083681 = 4361^2 + 1041^2 .

It is not an unprimeable number, because it can be changed into a prime (20102003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025499 + ... + 5025502.

Almost surely, 2^20102002 is an apocalyptic number.

20102002 is a deficient number, since it is larger than the sum of its proper divisors (10051004).

20102002 is a wasteful number, since it uses less digits than its factorization.

20102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051003.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20102002 is about 4483.5256216509. The cubic root of 20102002 is about 271.9024394202.

Adding to 20102002 its reverse (20020102), we get a palindrome (40122104).

The spelling of 20102002 in words is "twenty million, one hundred two thousand, two".