18495673420 has 96 divisors (see below), whose sum is σ = 45640336896. Its totient is φ = 6164121600.

The previous prime is 18495673403. The next prime is 18495673429. The reversal of 18495673420 is 2437659481.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18495673429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1262940 + ... + 1277500.

It is an arithmetic number, because the mean of its divisors is an integer number (475420176).

It is a 1-persistent number, because it is pandigital, but 2⋅18495673420 = 36991346840 is not.

Almost surely, 2^18495673420 is an apocalyptic number.

18495673420 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 18495673420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22820168448).

18495673420 is an abundant number, since it is smaller than the sum of its proper divisors (27144663476).

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

18495673420 is a wasteful number, since it uses less digits than its factorization.

18495673420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14831 (or 14829 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 18495673420 in words is "eighteen billion, four hundred ninety-five million, six hundred seventy-three thousand, four hundred twenty".