19853865269088 has 48 divisors (see below), whose sum is σ = 52138322213040. Its totient is φ = 6615170850816.

The previous prime is 19853865269071. The next prime is 19853865269089. The reversal of 19853865269088 is 88096256835891.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×19853865269088² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19853865269089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43274353 + ... + 43730736.

It is an arithmetic number, because the mean of its divisors is an integer number (1086215046105).

Almost surely, 2^{19853865269088} is an apocalyptic number.

It is an amenable number.

19853865269088 is an abundant number, since it is smaller than the sum of its proper divisors (32284456943952).

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

19853865269088 is a wasteful number, since it uses less digits than its factorization.

19853865269088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87007479 (or 87007471 counting only the distinct ones).

The product of its (nonzero) digits is 1791590400, while the sum is 78.

The spelling of 19853865269088 in words is "nineteen trillion, eight hundred fifty-three billion, eight hundred sixty-five million, two hundred sixty-nine thousand, eighty-eight".