19209699072 has 288 divisors, whose sum is σ = 60248616960. Its totient is φ = 6026711040.

The previous prime is 19209699017. The next prime is 19209699073. The reversal of 19209699072 is 27099690291.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×19209699072² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19209699073) 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, 7926853 + ... + 7929275.

Almost surely, 2^19209699072 is an apocalyptic number.

19209699072 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 19209699072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30124308480).

19209699072 is an abundant number, since it is smaller than the sum of its proper divisors (41038917888).

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

19209699072 is a wasteful number, since it uses less digits than its factorization.

19209699072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516 (or 2496 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 19209699072 in words is "nineteen billion, two hundred nine million, six hundred ninety-nine thousand, seventy-two".