19354652641 has 3 divisors (see below), whose sum is σ = 19354791763. Its totient is φ = 19354513520.

The previous prime is 19354652617. The next prime is 19354652657. The reversal of 19354652641 is 14625645391.

The square root of 19354652641 is 139121.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 7281038241 + 12073614400 = 85329^2 + 109880^2 .

It is not a de Polignac number, because 19354652641 - 2⁹ = 19354652129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19354652591 and 19354652600.

It is not an unprimeable number, because it can be changed into a prime (19354652341) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 69561 + ... + 208681.

Almost surely, 2^19354652641 is an apocalyptic number.

19354652641 is the 139121-st square number.

19354652641 is the 69561-st centered octagonal number.

It is an amenable number.

19354652641 is a deficient number, since it is larger than the sum of its proper divisors (139122).

19354652641 is an frugal number, since it uses more digits than its factorization.

19354652641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278242 (or 139121 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The spelling of 19354652641 in words is "nineteen billion, three hundred fifty-four million, six hundred fifty-two thousand, six hundred forty-one".