20102512323 has 8 divisors (see below), whose sum is σ = 26806007488. Its totient is φ = 13400346024.

The previous prime is 20102512319. The next prime is 20102512333. The reversal of 20102512323 is 32321520102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20102512323 - 2² = 20102512319 is a prime.

It is a super-2 number, since 2×20102512323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102512323.

It is not an unprimeable number, because it can be changed into a prime (20102512333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296365 + ... + 357822.

It is an arithmetic number, because the mean of its divisors is an integer number (3350750936).

Almost surely, 2^20102512323 is an apocalyptic number.

20102512323 is a deficient number, since it is larger than the sum of its proper divisors (6703495165).

20102512323 is a wasteful number, since it uses less digits than its factorization.

20102512323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664433.

The product of its (nonzero) digits is 720, while the sum is 21.

The spelling of 20102512323 in words is "twenty billion, one hundred two million, five hundred twelve thousand, three hundred twenty-three".