20423424100432 has 20 divisors (see below), whose sum is σ = 40846848201856. Its totient is φ = 9882301983840.

The previous prime is 20423424100367. The next prime is 20423424100481. The reversal of 20423424100432 is 23400142432402.

20423424100432 is an admirable number.

It is a super-2 number, since 2×20423424100432² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 20423424100394 and 20423424100403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20588128638 + ... + 20588129629.

Almost surely, 2^{20423424100432} is an apocalyptic number.

It is an amenable number.

20423424100432 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20423424100432 is a wasteful number, since it uses less digits than its factorization.

20423424100432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41176258306 (or 41176258300 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 20423424100432 its reverse (23400142432402), we get a palindrome (43823566532834).

The spelling of 20423424100432 in words is "twenty trillion, four hundred twenty-three billion, four hundred twenty-four million, one hundred thousand, four hundred thirty-two".