19701967 has 4 divisors (see below), whose sum is σ = 19714960. Its totient is φ = 19688976.

The previous prime is 19701947. The next prime is 19702009. The reversal of 19701967 is 76910791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76910791 = 53 ⋅1451147.

It is a cyclic number.

It is not a de Polignac number, because 19701967 - 2⁷ = 19701839 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 (19701937) 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, 3867 + ... + 7372.

It is an arithmetic number, because the mean of its divisors is an integer number (4928740).

Almost surely, 2^19701967 is an apocalyptic number.

19701967 is a deficient number, since it is larger than the sum of its proper divisors (12993).

19701967 is a wasteful number, since it uses less digits than its factorization.

19701967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12992.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 19701967 is about 4438.6897841593. The cubic root of 19701967 is about 270.0866982666.

The spelling of 19701967 in words is "nineteen million, seven hundred one thousand, nine hundred sixty-seven".