30196821 has 8 divisors (see below), whose sum is σ = 41561344. Its totient is φ = 19481760.

The previous prime is 30196813. The next prime is 30196823. The reversal of 30196821 is 12869103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30196821 - 2³ = 30196813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30196823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162256 + ... + 162441.

It is an arithmetic number, because the mean of its divisors is an integer number (5195168).

Almost surely, 2^30196821 is an apocalyptic number.

30196821 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30196821 is a deficient number, since it is larger than the sum of its proper divisors (11364523).

30196821 is a wasteful number, since it uses less digits than its factorization.

30196821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324731.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 30196821 is about 5495.1634188621. The cubic root of 30196821 is about 311.4012906212.

The spelling of 30196821 in words is "thirty million, one hundred ninety-six thousand, eight hundred twenty-one".