19497245881501 has 4 divisors (see below), whose sum is σ = 19529687223004. Its totient is φ = 19464804540000.

The previous prime is 19497245881483. The next prime is 19497245881601. The reversal of 19497245881501 is 10518854279491.

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 10100256048100 + 9396989833401 = 3178090^2 + 3065451^2 .

It is a cyclic number.

It is not a de Polignac number, because 19497245881501 - 2⁹ = 19497245880989 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 (19497245881601) 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, 16220669850 + ... + 16220671051.

It is an arithmetic number, because the mean of its divisors is an integer number (4882421805751).

Almost surely, 2^{19497245881501} is an apocalyptic number.

It is an amenable number.

19497245881501 is a deficient number, since it is larger than the sum of its proper divisors (32441341503).

19497245881501 is an equidigital number, since it uses as much as digits as its factorization.

19497245881501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32441341502.

The product of its (nonzero) digits is 29030400, while the sum is 64.

The spelling of 19497245881501 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred forty-five million, eight hundred eighty-one thousand, five hundred one".