19740000109452 has 144 divisors (see below), whose sum is σ = 55042049513472. Its totient is φ = 5393425340160.

The previous prime is 19740000109411. The next prime is 19740000109517. The reversal of 19740000109452 is 25490100004791.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183333552 + ... + 183441192.

Almost surely, 2^{19740000109452} is an apocalyptic number.

19740000109452 is a gapful number since it is divisible by the number (12) 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 19740000109452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27521024756736).

19740000109452 is an abundant number, since it is smaller than the sum of its proper divisors (35302049404020).

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

19740000109452 is a wasteful number, since it uses less digits than its factorization.

19740000109452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111828 (or 111803 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 19740000109452 in words is "nineteen trillion, seven hundred forty billion, one hundred nine thousand, four hundred fifty-two".