19952641 has 4 divisors (see below), whose sum is σ = 21002800. Its totient is φ = 18902484.

The previous prime is 19952617. The next prime is 19952663. The reversal of 19952641 is 14625991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14625991 = 19 ⋅769789.

It is a cyclic number.

It is not a de Polignac number, because 19952641 - 2¹⁷ = 19821569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19952641.

It is not an unprimeable number, because it can be changed into a prime (19952041) 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, 525051 + ... + 525088.

It is an arithmetic number, because the mean of its divisors is an integer number (5250700).

Almost surely, 2^19952641 is an apocalyptic number.

It is an amenable number.

19952641 is a deficient number, since it is larger than the sum of its proper divisors (1050159).

19952641 is a wasteful number, since it uses less digits than its factorization.

19952641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050158.

The product of its digits is 19440, while the sum is 37.

The square root of 19952641 is about 4466.8379196026. The cubic root of 19952641 is about 271.2273388163.

The spelling of 19952641 in words is "nineteen million, nine hundred fifty-two thousand, six hundred forty-one".