20210000001 has 4 divisors (see below), whose sum is σ = 26946666672. Its totient is φ = 13473333332.

The previous prime is 20209999991. The next prime is 20210000023. The reversal of 20210000001 is 10000001202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20210000001 - 2⁵ = 20209999969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20210000201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368333331 + ... + 3368333336.

It is an arithmetic number, because the mean of its divisors is an integer number (6736666668).

Almost surely, 2^20210000001 is an apocalyptic number.

It is an amenable number.

20210000001 is a deficient number, since it is larger than the sum of its proper divisors (6736666671).

20210000001 is an equidigital number, since it uses as much as digits as its factorization.

20210000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736666670.

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 20210000001 its reverse (10000001202), we get a palindrome (30210001203).

It can be divided in two parts, 202 and 10000001, that multiplied together give a palindrome (2020000202).

The spelling of 20210000001 in words is "twenty billion, two hundred ten million, one", and thus it is an aban number.