23003051421 has 24 divisors (see below), whose sum is σ = 36005550240. Its totient is φ = 13023999072.

The previous prime is 23003051399. The next prime is 23003051429. The reversal of 23003051421 is 12415030032.

It is not a de Polignac number, because 23003051421 - 2⁹ = 23003050909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23003051429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 701791 + ... + 733836.

It is an arithmetic number, because the mean of its divisors is an integer number (1500231260).

Almost surely, 2^23003051421 is an apocalyptic number.

23003051421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23003051421 is a deficient number, since it is larger than the sum of its proper divisors (13002498819).

23003051421 is a wasteful number, since it uses less digits than its factorization.

23003051421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435753 (or 1435746 counting only the distinct ones).

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

Adding to 23003051421 its reverse (12415030032), we get a palindrome (35418081453).

The spelling of 23003051421 in words is "twenty-three billion, three million, fifty-one thousand, four hundred twenty-one".