20423333420 has 48 divisors (see below), whose sum is σ = 49156564800. Its totient is φ = 6982205184.

The previous prime is 20423333419. The next prime is 20423333431. The reversal of 20423333420 is 2433332402.

It is a super-2 number, since 2×20423333420² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20423333420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160139 + ... + 257858.

It is an arithmetic number, because the mean of its divisors is an integer number (1024095100).

Almost surely, 2^20423333420 is an apocalyptic number.

20423333420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423333420 is an abundant number, since it is smaller than the sum of its proper divisors (28733231380).

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

20423333420 is a wasteful number, since it uses less digits than its factorization.

20423333420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418362 (or 418360 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 26.

Adding to 20423333420 its reverse (2433332402), we get a palindrome (22856665822).

The spelling of 20423333420 in words is "twenty billion, four hundred twenty-three million, three hundred thirty-three thousand, four hundred twenty".