19669743000 has 256 divisors, whose sum is σ = 70542576000. Its totient is φ = 5064192000.

The previous prime is 19669742999. The next prime is 19669743007. The reversal of 19669743000 is 34796691.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19669743007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 770440 + ... + 795560.

Almost surely, 2^19669743000 is an apocalyptic number.

19669743000 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 19669743000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35271288000).

19669743000 is an abundant number, since it is smaller than the sum of its proper divisors (50872833000).

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

19669743000 is a wasteful number, since it uses less digits than its factorization.

19669743000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25180 (or 25160 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 19669743000 in words is "nineteen billion, six hundred sixty-nine million, seven hundred forty-three thousand".