19752641 has 4 divisors (see below), whose sum is σ = 19878612. Its totient is φ = 19626672.

The previous prime is 19752631. The next prime is 19752659. The reversal of 19752641 is 14625791.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2146225 + 17606416 = 1465^2 + 4196^2 .

It is a cyclic number.

It is not a de Polignac number, because 19752641 - 2²² = 15558337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19752631) 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, 62750 + ... + 63063.

It is an arithmetic number, because the mean of its divisors is an integer number (4969653).

Almost surely, 2^19752641 is an apocalyptic number.

It is an amenable number.

19752641 is a deficient number, since it is larger than the sum of its proper divisors (125971).

19752641 is a wasteful number, since it uses less digits than its factorization.

19752641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125970.

The product of its digits is 15120, while the sum is 35.

The square root of 19752641 is about 4444.3943344397. The cubic root of 19752641 is about 270.3180568272.

The spelling of 19752641 in words is "nineteen million, seven hundred fifty-two thousand, six hundred forty-one".