19213655040 has 132 divisors (see below), whose sum is σ = 66574974024. Its totient is φ = 5123629056.

The previous prime is 19213655039. The next prime is 19213655047. The reversal of 19213655040 is 4055631291.

19213655040 is a `hidden beast` number, since 1 + 92 + 1 + 3 + 65 + 504 + 0 = 666.

It is a super-2 number, since 2×19213655040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19213654986 and 19213655004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19213655047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162402 + ... + 254561.

Almost surely, 2^19213655040 is an apocalyptic number.

19213655040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19213655040 is an abundant number, since it is smaller than the sum of its proper divisors (47361318984).

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

19213655040 is a wasteful number, since it uses less digits than its factorization.

19213655040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416994 (or 416973 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 19213655040 in words is "nineteen billion, two hundred thirteen million, six hundred fifty-five thousand, forty".