193021980 has 48 divisors (see below), whose sum is σ = 563963904. Its totient is φ = 49234240.

The previous prime is 193021943. The next prime is 193021993. The reversal of 193021980 is 89120391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68556 + ... + 71315.

It is an arithmetic number, because the mean of its divisors is an integer number (11749248).

Almost surely, 2^193021980 is an apocalyptic number.

193021980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

193021980 is an abundant number, since it is smaller than the sum of its proper divisors (370941924).

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

193021980 is a wasteful number, since it uses less digits than its factorization.

193021980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139906 (or 139904 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 193021980 is about 13893.2350444380. The cubic root of 193021980 is about 577.9215939112.

The spelling of 193021980 in words is "one hundred ninety-three million, twenty-one thousand, nine hundred eighty".