20100020001 has 4 divisors (see below), whose sum is σ = 26800026672. Its totient is φ = 13400013332.

The previous prime is 20100019963. The next prime is 20100020009. The reversal of 20100020001 is 10002000102.

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 20100020001 - 2²¹ = 20097922849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20100020009) 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, 3350003331 + ... + 3350003336.

It is an arithmetic number, because the mean of its divisors is an integer number (6700006668).

Almost surely, 2^20100020001 is an apocalyptic number.

It is an amenable number.

20100020001 is a deficient number, since it is larger than the sum of its proper divisors (6700006671).

20100020001 is an equidigital number, since it uses as much as digits as its factorization.

20100020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700006670.

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

Adding to 20100020001 its reverse (10002000102), we get a palindrome (30102020103).

The spelling of 20100020001 in words is "twenty billion, one hundred million, twenty thousand, one".