19497245884540 has 24 divisors (see below), whose sum is σ = 41815369899072. Its totient is φ = 7632964345920.

The previous prime is 19497245884531. The next prime is 19497245884541. The reversal of 19497245884540 is 4548854279491.

It is a super-2 number, since 2×19497245884540² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19497245884540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19497245884541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10370874531 + ... + 10370876410.

It is an arithmetic number, because the mean of its divisors is an integer number (1742307079128).

Almost surely, 2^{19497245884540} is an apocalyptic number.

19497245884540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19497245884540 is an abundant number, since it is smaller than the sum of its proper divisors (22318124014532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19497245884540 is a wasteful number, since it uses less digits than its factorization.

19497245884540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20741750997 (or 20741750995 counting only the distinct ones).

The product of its (nonzero) digits is 464486400, while the sum is 70.

The spelling of 19497245884540 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred forty-five million, eight hundred eighty-four thousand, five hundred forty".