19747992000 has 896 divisors, whose sum is σ = 77903953920. Its totient is φ = 4354560000.

The previous prime is 19747991993. The next prime is 19747992007. The reversal of 19747992000 is 29974791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19747991993) and next prime (19747992007).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19747992007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 155495937 + ... + 155496063.

Almost surely, 2^19747992000 is an apocalyptic number.

19747992000 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 19747992000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38951976960).

19747992000 is an abundant number, since it is smaller than the sum of its proper divisors (58155961920).

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

19747992000 is a wasteful number, since it uses less digits than its factorization.

19747992000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 48.

The spelling of 19747992000 in words is "nineteen billion, seven hundred forty-seven million, nine hundred ninety-two thousand".