20213233123 has 4 divisors (see below), whose sum is σ = 20303875648. Its totient is φ = 20122590600.

The previous prime is 20213233109. The next prime is 20213233153. The reversal of 20213233123 is 32133231202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20213233123 - 2⁵ = 20213233091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213233094 and 20213233103.

It is not an unprimeable number, because it can be changed into a prime (20213233153) 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, 45320928 + ... + 45321373.

It is an arithmetic number, because the mean of its divisors is an integer number (5075968912).

Almost surely, 2^20213233123 is an apocalyptic number.

20213233123 is a deficient number, since it is larger than the sum of its proper divisors (90642525).

20213233123 is an equidigital number, since it uses as much as digits as its factorization.

20213233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90642524.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20213233123 its reverse (32133231202), we get a palindrome (52346464325).

The spelling of 20213233123 in words is "twenty billion, two hundred thirteen million, two hundred thirty-three thousand, one hundred twenty-three".