20320332123 has 32 divisors (see below), whose sum is σ = 34796030976. Its totient is φ = 10252395648.

The previous prime is 20320332041. The next prime is 20320332127. The reversal of 20320332123 is 32123302302.

It is not a de Polignac number, because 20320332123 - 2²⁰ = 20319283547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20320332123.

It is not an unprimeable number, because it can be changed into a prime (20320332127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1611840 + ... + 1624397.

It is an arithmetic number, because the mean of its divisors is an integer number (1087375968).

Almost surely, 2^20320332123 is an apocalyptic number.

20320332123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20320332123 is a deficient number, since it is larger than the sum of its proper divisors (14475698853).

20320332123 is a wasteful number, since it uses less digits than its factorization.

20320332123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236283.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20320332123 its reverse (32123302302), we get a palindrome (52443634425).

The spelling of 20320332123 in words is "twenty billion, three hundred twenty million, three hundred thirty-two thousand, one hundred twenty-three".