18923842080 has 480 divisors, whose sum is σ = 78468844608. Its totient is φ = 4234291200.

The previous prime is 18923842079. The next prime is 18923842081. The reversal of 18923842080 is 8024832981.

It is an interprime number because it is at equal distance from previous prime (18923842079) and next prime (18923842081).

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×18923842080² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (18923842081) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 1848175 + ... + 1858385.

Almost surely, 2^18923842080 is an apocalyptic number.

18923842080 is a gapful number since it is divisible by the number (10) 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 18923842080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39234422304).

18923842080 is an abundant number, since it is smaller than the sum of its proper divisors (59545002528).

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

18923842080 is a wasteful number, since it uses less digits than its factorization.

18923842080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10262 (or 10245 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 18923842080 in words is "eighteen billion, nine hundred twenty-three million, eight hundred forty-two thousand, eighty".