18972223115400 has 384 divisors, whose sum is σ = 65915290080000. Its totient is φ = 5015584696320.

The previous prime is 18972223115381. The next prime is 18972223115413. The reversal of 18972223115400 is 451132227981.

18972223115400 is a `hidden beast` number, since 1 + 8 + 9 + 7 + 2 + 2 + 231 + 1 + 5 + 400 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 297632332 + ... + 297696068.

It is an arithmetic number, because the mean of its divisors is an integer number (171654401250).

Almost surely, 2^{18972223115400} is an apocalyptic number.

18972223115400 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 18972223115400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32957645040000).

18972223115400 is an abundant number, since it is smaller than the sum of its proper divisors (46943066964600).

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

18972223115400 is a wasteful number, since it uses less digits than its factorization.

18972223115400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64238 (or 64223 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 18972223115400 in words is "eighteen trillion, nine hundred seventy-two billion, two hundred twenty-three million, one hundred fifteen thousand, four hundred".