193387912020 has 96 divisors (see below), whose sum is σ = 602219063040. Its totient is φ = 51521443200.

The previous prime is 193387912009. The next prime is 193387912031. The reversal of 193387912020 is 20219783391.

It is an interprime number because it is at equal distance from previous prime (193387912009) and next prime (193387912031).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 405570 + ... + 742470.

It is an arithmetic number, because the mean of its divisors is an integer number (6273115240).

Almost surely, 2^193387912020 is an apocalyptic number.

193387912020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 193387912020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301109531520).

193387912020 is an abundant number, since it is smaller than the sum of its proper divisors (408831151020).

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

193387912020 is a wasteful number, since it uses less digits than its factorization.

193387912020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337982 (or 337974 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 193387912020 in words is "one hundred ninety-three billion, three hundred eighty-seven million, nine hundred twelve thousand, twenty".