196856021 has 8 divisors (see below), whose sum is σ = 206879904. Its totient is φ = 187079760.

The previous prime is 196856003. The next prime is 196856027. The reversal of 196856021 is 120658691.

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

It is a cyclic number.

It is not a de Polignac number, because 196856021 - 2¹⁴ = 196839637 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 (196856027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60275 + ... + 63456.

It is an arithmetic number, because the mean of its divisors is an integer number (25859988).

Almost surely, 2^196856021 is an apocalyptic number.

It is an amenable number.

196856021 is a deficient number, since it is larger than the sum of its proper divisors (10023883).

196856021 is a wasteful number, since it uses less digits than its factorization.

196856021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123811.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 196856021 is about 14030.5388706208. The cubic root of 196856021 is about 581.7229987159.

The spelling of 196856021 in words is "one hundred ninety-six million, eight hundred fifty-six thousand, twenty-one".