193478386920 has 128 divisors (see below), whose sum is σ = 714381776640. Its totient is φ = 40821811200.

The previous prime is 193478386903. The next prime is 193478386951. The reversal of 193478386920 is 29683874391.

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

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, 8847981 + ... + 8869820.

It is an arithmetic number, because the mean of its divisors is an integer number (5581107630).

Almost surely, 2^193478386920 is an apocalyptic number.

193478386920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

193478386920 is an abundant number, since it is smaller than the sum of its proper divisors (520903389720).

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

193478386920 is a wasteful number, since it uses less digits than its factorization.

193478386920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17717835 (or 17717831 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 193478386920 in words is "one hundred ninety-three billion, four hundred seventy-eight million, three hundred eighty-six thousand, nine hundred twenty".