20001001223 has 16 divisors (see below), whose sum is σ = 23006856960. Its totient is φ = 17032464000.

The previous prime is 20001001201. The next prime is 20001001291. The reversal of 20001001223 is 32210010002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20001001223 - 2⁸ = 20001000967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001001523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1498208 + ... + 1511498.

It is an arithmetic number, because the mean of its divisors is an integer number (1437928560).

Almost surely, 2^20001001223 is an apocalyptic number.

20001001223 is a deficient number, since it is larger than the sum of its proper divisors (3005855737).

20001001223 is a wasteful number, since it uses less digits than its factorization.

20001001223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14678.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20001001223 its reverse (32210010002), we get a palindrome (52211011225).

The spelling of 20001001223 in words is "twenty billion, one million, one thousand, two hundred twenty-three".