19855535480 has 32 divisors (see below), whose sum is σ = 48736315440. Its totient is φ = 7220194560.

The previous prime is 19855535461. The next prime is 19855535489. The reversal of 19855535480 is 8453555891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19855535489) 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, 22562669 + ... + 22563548.

Almost surely, 2^19855535480 is an apocalyptic number.

19855535480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19855535480 is an abundant number, since it is smaller than the sum of its proper divisors (28880779960).

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

19855535480 is a wasteful number, since it uses less digits than its factorization.

19855535480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45126239 (or 45126235 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 53.

The spelling of 19855535480 in words is "nineteen billion, eight hundred fifty-five million, five hundred thirty-five thousand, four hundred eighty".