20233929109 has 4 divisors (see below), whose sum is σ = 20576877120. Its totient is φ = 19890981100.

The previous prime is 20233929077. The next prime is 20233929119. The reversal of 20233929109 is 90192933202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90192933202 = 2 ⋅45096466601.

It is a cyclic number.

It is not a de Polignac number, because 20233929109 - 2⁵ = 20233929077 is a prime.

It is a super-3 number, since 3×20233929109³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233929119) 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, 171473917 + ... + 171474034.

It is an arithmetic number, because the mean of its divisors is an integer number (5144219280).

Almost surely, 2^20233929109 is an apocalyptic number.

It is an amenable number.

20233929109 is a deficient number, since it is larger than the sum of its proper divisors (342948011).

20233929109 is an equidigital number, since it uses as much as digits as its factorization.

20233929109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342948010.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 20233929109 in words is "twenty billion, two hundred thirty-three million, nine hundred twenty-nine thousand, one hundred nine".