1720021472412 has 48 divisors (see below), whose sum is σ = 4023168229920. Its totient is φ = 571943006208.

The previous prime is 1720021472357. The next prime is 1720021472413. The reversal of 1720021472412 is 2142741200271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720021472413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53445558 + ... + 53477730.

It is an arithmetic number, because the mean of its divisors is an integer number (83816004790).

Almost surely, 2^{1720021472412} is an apocalyptic number.

1720021472412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1720021472412 is an abundant number, since it is smaller than the sum of its proper divisors (2303146757508).

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

1720021472412 is a wasteful number, since it uses less digits than its factorization.

1720021472412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42902 (or 42900 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

Adding to 1720021472412 its reverse (2142741200271), we get a palindrome (3862762672683).

The spelling of 1720021472412 in words is "one trillion, seven hundred twenty billion, twenty-one million, four hundred seventy-two thousand, four hundred twelve".