190821012 has 12 divisors (see below), whose sum is σ = 445249056. Its totient is φ = 63607000.

The previous prime is 190820999. The next prime is 190821013. The reversal of 190821012 is 210128091.

190821012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190821013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7950864 + ... + 7950887.

It is an arithmetic number, because the mean of its divisors is an integer number (37104088).

Almost surely, 2^190821012 is an apocalyptic number.

190821012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

190821012 is an abundant number, since it is smaller than the sum of its proper divisors (254428044).

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

190821012 is a wasteful number, since it uses less digits than its factorization.

190821012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901758 (or 15901756 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 190821012 is about 13813.7978847238. The cubic root of 190821012 is about 575.7165730403.

The spelling of 190821012 in words is "one hundred ninety million, eight hundred twenty-one thousand, twelve".