20423441420 has 48 divisors (see below), whose sum is σ = 43250040288. Its totient is φ = 8100925440.

The previous prime is 20423441413. The next prime is 20423441447. The reversal of 20423441420 is 2414432402.

It is a happy number.

It is a super-3 number, since 3×20423441420³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20423441420.

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, 1215275 + ... + 1231965.

It is an arithmetic number, because the mean of its divisors is an integer number (901042506).

Almost surely, 2^20423441420 is an apocalyptic number.

20423441420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423441420 is an abundant number, since it is smaller than the sum of its proper divisors (22826598868).

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

20423441420 is a wasteful number, since it uses less digits than its factorization.

20423441420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17210 (or 17208 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20423441420 its reverse (2414432402), we get a palindrome (22837873822).

The spelling of 20423441420 in words is "twenty billion, four hundred twenty-three million, four hundred forty-one thousand, four hundred twenty".