20104001001 has 48 divisors (see below), whose sum is σ = 34102548480. Its totient is φ = 11173528800.

The previous prime is 20104000993. The next prime is 20104001003. The reversal of 20104001001 is 10010040102.

It is a happy number.

It is not a de Polignac number, because 20104001001 - 2³ = 20104000993 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20104001003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 631926 + ... + 662976.

It is an arithmetic number, because the mean of its divisors is an integer number (710469760).

Almost surely, 2^20104001001 is an apocalyptic number.

20104001001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20104001001 is a deficient number, since it is larger than the sum of its proper divisors (13998547479).

20104001001 is a wasteful number, since it uses less digits than its factorization.

20104001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31346 (or 31343 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20104001001 its reverse (10010040102), we get a palindrome (30114041103).

The spelling of 20104001001 in words is "twenty billion, one hundred four million, one thousand, one".