20200002102 has 40 divisors (see below), whose sum is σ = 51729108816. Its totient is φ = 5771428848.

The previous prime is 20200002047. The next prime is 20200002107. The reversal of 20200002102 is 20120000202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200002107) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8905393 + ... + 8907660.

Almost surely, 2^20200002102 is an apocalyptic number.

20200002102 is an abundant number, since it is smaller than the sum of its proper divisors (31529106714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20200002102 is a wasteful number, since it uses less digits than its factorization.

20200002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17813074 (or 17813065 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20200002102 its reverse (20120000202), we get a palindrome (40320002304).

The spelling of 20200002102 in words is "twenty billion, two hundred million, two thousand, one hundred two".