20210400002 has 8 divisors (see below), whose sum is σ = 32647569276. Its totient is φ = 9327876912.

The previous prime is 20210399941. The next prime is 20210400019. The reversal of 20210400002 is 20000401202.

It can be written as a sum of positive squares in 2 ways, for example, as 19393069081 + 817330921 = 139259^2 + 28589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388661513 + ... + 388661564.

Almost surely, 2^20210400002 is an apocalyptic number.

20210400002 is a deficient number, since it is larger than the sum of its proper divisors (12437169274).

20210400002 is a wasteful number, since it uses less digits than its factorization.

20210400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777323092.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20210400002 its reverse (20000401202), we get a palindrome (40210801204).

The spelling of 20210400002 in words is "twenty billion, two hundred ten million, four hundred thousand, two".