23898989906 has 16 divisors (see below), whose sum is σ = 41165724960. Its totient is φ = 10291430880.

The previous prime is 23898989897. The next prime is 23898989923. The reversal of 23898989906 is 60998989832.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23898989906.

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 7 ways as a sum of consecutive naturals, for example, 28586891 + ... + 28587726.

It is an arithmetic number, because the mean of its divisors is an integer number (2572857810).

Almost surely, 2^23898989906 is an apocalyptic number.

23898989906 is a deficient number, since it is larger than the sum of its proper divisors (17266735054).

23898989906 is a wasteful number, since it uses less digits than its factorization.

23898989906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57174649.

The product of its (nonzero) digits is 120932352, while the sum is 71.

The spelling of 23898989906 in words is "twenty-three billion, eight hundred ninety-eight million, nine hundred eighty-nine thousand, nine hundred six".