20123210328 has 64 divisors (see below), whose sum is σ = 55499320800. Its totient is φ = 6040734720.

The previous prime is 20123210323. The next prime is 20123210329. The reversal of 20123210328 is 82301232102.

It is a happy number.

It is a super-3 number, since 3×20123210328³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20123210298 and 20123210307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123210323) 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, 773763 + ... + 799346.

Almost surely, 2^20123210328 is an apocalyptic number.

It is an amenable number.

20123210328 is an abundant number, since it is smaller than the sum of its proper divisors (35376110472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123210328 is a wasteful number, since it uses less digits than its factorization.

20123210328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573172 (or 1573168 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 20123210328 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, three hundred twenty-eight".