19740671 has 4 divisors (see below), whose sum is σ = 19932432. Its totient is φ = 19548912.

The previous prime is 19740667. The next prime is 19740691. The reversal of 19740671 is 17604791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19740671 - 2² = 19740667 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 (19740631) 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, 95726 + ... + 95931.

It is an arithmetic number, because the mean of its divisors is an integer number (4983108).

Almost surely, 2^19740671 is an apocalyptic number.

19740671 is a deficient number, since it is larger than the sum of its proper divisors (191761).

19740671 is a wasteful number, since it uses less digits than its factorization.

19740671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191760.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 19740671 is about 4443.0474901806. The cubic root of 19740671 is about 270.2634420043.

The spelling of 19740671 in words is "nineteen million, seven hundred forty thousand, six hundred seventy-one".