23421898 has 4 divisors (see below), whose sum is σ = 35132850. Its totient is φ = 11710948.

The previous prime is 23421877. The next prime is 23421899. The reversal of 23421898 is 89812432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23357889 + 64009 = 4833^2 + 253^2 .

It is not an unprimeable number, because it can be changed into a prime (23421899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5855473 + ... + 5855476.

Almost surely, 2^23421898 is an apocalyptic number.

23421898 is a deficient number, since it is larger than the sum of its proper divisors (11710952).

23421898 is a wasteful number, since it uses less digits than its factorization.

23421898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11710951.

The product of its digits is 27648, while the sum is 37.

The square root of 23421898 is about 4839.6175468729. The cubic root of 23421898 is about 286.1150449189.

The spelling of 23421898 in words is "twenty-three million, four hundred twenty-one thousand, eight hundred ninety-eight".