23198449920 has 144 divisors (see below), whose sum is σ = 74675005440. Its totient is φ = 6137413632.

The previous prime is 23198449919. The next prime is 23198449933. The reversal of 23198449920 is 2994489132.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 463896 + ... + 511464.

Almost surely, 2^23198449920 is an apocalyptic number.

23198449920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23198449920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37337502720).

23198449920 is an abundant number, since it is smaller than the sum of its proper divisors (51476555520).

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

23198449920 is a wasteful number, since it uses less digits than its factorization.

23198449920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47720 (or 47706 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 23198449920 in words is "twenty-three billion, one hundred ninety-eight million, four hundred forty-nine thousand, nine hundred twenty".