19702081 has 8 divisors (see below), whose sum is σ = 23243264. Its totient is φ = 16342560.

The previous prime is 19702079. The next prime is 19702129. The reversal of 19702081 is 18020791.

19702081 = T₃₁₃ + T₃₁₄ + ... + T₅₂₉.

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 19702081 - 2¹ = 19702079 is a prime.

It is a super-2 number, since 2×19702081² = 776343991461122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19702021) 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, 45180 + ... + 45613.

It is an arithmetic number, because the mean of its divisors is an integer number (2905408).

Almost surely, 2^19702081 is an apocalyptic number.

It is an amenable number.

19702081 is a deficient number, since it is larger than the sum of its proper divisors (3541183).

19702081 is an equidigital number, since it uses as much as digits as its factorization.

19702081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90831.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 19702081 is about 4438.7026257680. The cubic root of 19702081 is about 270.0872191930.

The spelling of 19702081 in words is "nineteen million, seven hundred two thousand, eighty-one".