19505122214640 has 40 divisors (see below), whose sum is σ = 60465878866128. Its totient is φ = 5201365923840.

The previous prime is 19505122214603. The next prime is 19505122214653. The reversal of 19505122214640 is 4641222150591.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 19505122214592 and 19505122214601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40635671041 + ... + 40635671520.

Almost surely, 2^{19505122214640} is an apocalyptic number.

19505122214640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19505122214640 is an abundant number, since it is smaller than the sum of its proper divisors (40960756651488).

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

19505122214640 is a wasteful number, since it uses less digits than its factorization.

19505122214640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81271342577 (or 81271342571 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 19505122214640 in words is "nineteen trillion, five hundred five billion, one hundred twenty-two million, two hundred fourteen thousand, six hundred forty".