20210002002 has 12 divisors (see below), whose sum is σ = 43788337710. Its totient is φ = 6736667328.

The previous prime is 20210001991. The next prime is 20210002051. The reversal of 20210002002 is 20020001202.

It can be written as a sum of positive squares in only one way, i.e., 16200452961 + 4009549041 = 127281^2 + 63321^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561388927 + ... + 561388962.

Almost surely, 2^20210002002 is an apocalyptic number.

20210002002 is an abundant number, since it is smaller than the sum of its proper divisors (23578335708).

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

20210002002 is a wasteful number, since it uses less digits than its factorization.

20210002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122777897 (or 1122777894 counting only the distinct ones).

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

Adding to 20210002002 its reverse (20020001202), we get a palindrome (40230003204).

The spelling of 20210002002 in words is "twenty billion, two hundred ten million, two thousand, two".