20102001002 has 4 divisors (see below), whose sum is σ = 30153001506. Its totient is φ = 10051000500.

The previous prime is 20102001001. The next prime is 20102001037. The reversal of 20102001002 is 20010020102.

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., 18265792801 + 1836208201 = 135151^2 + 42851^2 .

It is not an unprimeable number, because it can be changed into a prime (20102001001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025500249 + ... + 5025500252.

Almost surely, 2^20102001002 is an apocalyptic number.

20102001002 is a deficient number, since it is larger than the sum of its proper divisors (10051000504).

20102001002 is a wasteful number, since it uses less digits than its factorization.

20102001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051000503.

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

Adding to 20102001002 its reverse (20010020102), we get a palindrome (40112021104).

The spelling of 20102001002 in words is "twenty billion, one hundred two million, one thousand, two".