23189449500 has 480 divisors, whose sum is σ = 87181750656. Its totient is φ = 5256576000.

The previous prime is 23189449477. The next prime is 23189449531. The reversal of 23189449500 is 594498132.

23189449500 is a `hidden beast` number, since 2 + 3 + 18 + 94 + 49 + 500 = 666.

It is a super-2 number, since 2×23189449500² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 44509240 + ... + 44509760.

Almost surely, 2^23189449500 is an apocalyptic number.

23189449500 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 23189449500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43590875328).

23189449500 is an abundant number, since it is smaller than the sum of its proper divisors (63992301156).

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

23189449500 is a wasteful number, since it uses less digits than its factorization.

23189449500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 23189449500 in words is "twenty-three billion, one hundred eighty-nine million, four hundred forty-nine thousand, five hundred".