19406664049920 has 288 divisors, whose sum is σ = 72170825755392. Its totient is φ = 4352114098176.

The previous prime is 19406664049919. The next prime is 19406664049937. The reversal of 19406664049920 is 2994046660491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5386437 + ... + 8235716.

It is an arithmetic number, because the mean of its divisors is an integer number (250593144984).

Almost surely, 2^{19406664049920} is an apocalyptic number.

19406664049920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19406664049920 is an abundant number, since it is smaller than the sum of its proper divisors (52764161705472).

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

19406664049920 is a wasteful number, since it uses less digits than its factorization.

19406664049920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13622237 (or 13622223 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 60.

The spelling of 19406664049920 in words is "nineteen trillion, four hundred six billion, six hundred sixty-four million, forty-nine thousand, nine hundred twenty".