20423350512 has 60 divisors (see below), whose sum is σ = 57845688264. Its totient is φ = 6725758080.

The previous prime is 20423350511. The next prime is 20423350523. The reversal of 20423350512 is 21505332402.

It is a happy number.

It is a super-2 number, since 2×20423350512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423350511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 842439 + ... + 866342.

Almost surely, 2^20423350512 is an apocalyptic number.

It is an amenable number.

20423350512 is an abundant number, since it is smaller than the sum of its proper divisors (37422337752).

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

20423350512 is a wasteful number, since it uses less digits than its factorization.

20423350512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708878 (or 1708869 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20423350512 its reverse (21505332402), we get a palindrome (41928682914).

The spelling of 20423350512 in words is "twenty billion, four hundred twenty-three million, three hundred fifty thousand, five hundred twelve".