20001223029 has 4 divisors (see below), whose sum is σ = 26668297376. Its totient is φ = 13334148684.

The previous prime is 20001223019. The next prime is 20001223087. The reversal of 20001223029 is 92032210002.

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 not a de Polignac number, because 20001223029 - 2¹³ = 20001214837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20001222996 and 20001223014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001223019) 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, 3333537169 + ... + 3333537174.

It is an arithmetic number, because the mean of its divisors is an integer number (6667074344).

Almost surely, 2^20001223029 is an apocalyptic number.

It is an amenable number.

20001223029 is a deficient number, since it is larger than the sum of its proper divisors (6667074347).

20001223029 is an equidigital number, since it uses as much as digits as its factorization.

20001223029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667074346.

The product of its (nonzero) digits is 432, while the sum is 21.

The spelling of 20001223029 in words is "twenty billion, one million, two hundred twenty-three thousand, twenty-nine".