43321620702473 has 4 divisors (see below), whose sum is σ = 43342358675220. Its totient is φ = 43300882729728.

The previous prime is 43321620702467. The next prime is 43321620702499. The reversal of 43321620702473 is 37420702612334.

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 32070339172624 + 11251281529849 = 5663068^2 + 3354293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43321620702473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43327620702473) 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, 10368983240 + ... + 10368987417.

It is an arithmetic number, because the mean of its divisors is an integer number (10835589668805).

Almost surely, 2^{43321620702473} is an apocalyptic number.

It is an amenable number.

43321620702473 is a deficient number, since it is larger than the sum of its proper divisors (20737972747).

43321620702473 is a wasteful number, since it uses less digits than its factorization.

43321620702473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20737972746.

The product of its (nonzero) digits is 1016064, while the sum is 44.

The spelling of 43321620702473 in words is "forty-three trillion, three hundred twenty-one billion, six hundred twenty million, seven hundred two thousand, four hundred seventy-three".