20100002 has 16 divisors (see below), whose sum is σ = 33022080. Its totient is φ = 9118992.

The previous prime is 20099983. The next prime is 20100023. The reversal of 20100002 is 20000102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5018 + ... + 8085.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 2^20100002 is an apocalyptic number.

20100002 is a deficient number, since it is larger than the sum of its proper divisors (12922078).

20100002 is a wasteful number, since it uses less digits than its factorization.

20100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13177.

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 20100002 is about 4483.3025773418. The cubic root of 20100002 is about 271.8934216962.

Adding to 20100002 its reverse (20000102), we get a palindrome (40100104).

Multiplying 20100002 by its reverse (20000102), we get a palindrome (402002090200204).

The spelling of 20100002 in words is "twenty million, one hundred thousand, two".