19497245881520 has 80 divisors (see below), whose sum is σ = 52361052883488. Its totient is φ = 6672854200320.

The previous prime is 19497245881483. The next prime is 19497245881601. The reversal of 19497245881520 is 2518854279491.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651630959 + ... + 651660878.

Almost surely, 2^{19497245881520} is an apocalyptic number.

19497245881520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19497245881520 is an abundant number, since it is smaller than the sum of its proper divisors (32863807001968).

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

19497245881520 is a wasteful number, since it uses less digits than its factorization.

19497245881520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303291878 (or 1303291872 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 65.

The spelling of 19497245881520 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred forty-five million, eight hundred eighty-one thousand, five hundred twenty".