193821030 has 72 divisors (see below), whose sum is σ = 545723568. Its totient is φ = 47706048.

The previous prime is 193820993. The next prime is 193821037. The reversal of 193821030 is 30128391.

It is a junction number, because it is equal to n+sod(n) for n = 193820985 and 193821003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193821037) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8839 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (7579494).

Almost surely, 2^193821030 is an apocalyptic number.

193821030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 193821030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272861784).

193821030 is an abundant number, since it is smaller than the sum of its proper divisors (351902538).

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

193821030 is a wasteful number, since it uses less digits than its factorization.

193821030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12782 (or 12766 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 193821030 is about 13921.9621461919. The cubic root of 193821030 is about 578.7179669321.

The spelling of 193821030 in words is "one hundred ninety-three million, eight hundred twenty-one thousand, thirty".