19953820080 has 60 divisors (see below), whose sum is σ = 67011581520. Its totient is φ = 5321018496.

The previous prime is 19953820067. The next prime is 19953820109. The reversal of 19953820080 is 8002835991.

It is a happy number.

19953820080 is a `hidden beast` number, since 1 + 99 + 538 + 20 + 0 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×19953820080² (a number of 21 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 13856100 + ... + 13857539.

It is an arithmetic number, because the mean of its divisors is an integer number (1116859692).

Almost surely, 2^19953820080 is an apocalyptic number.

19953820080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19953820080 is an abundant number, since it is smaller than the sum of its proper divisors (47057761440).

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

19953820080 is a wasteful number, since it uses less digits than its factorization.

19953820080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27713658 (or 27713649 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 19953820080 in words is "nineteen billion, nine hundred fifty-three million, eight hundred twenty thousand, eighty".