20072062165521 has 4 divisors (see below), whose sum is σ = 26762749554032. Its totient is φ = 13381374777012.

The previous prime is 20072062165457. The next prime is 20072062165537. The reversal of 20072062165521 is 12556126027002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20072062165521 - 2⁶ = 20072062165457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20072062165521.

It is not an unprimeable number, because it can be changed into a prime (20072062165591) 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, 3345343694251 + ... + 3345343694256.

It is an arithmetic number, because the mean of its divisors is an integer number (6690687388508).

Almost surely, 2^{20072062165521} is an apocalyptic number.

It is an amenable number.

20072062165521 is a deficient number, since it is larger than the sum of its proper divisors (6690687388511).

20072062165521 is an equidigital number, since it uses as much as digits as its factorization.

20072062165521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690687388510.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 20072062165521 in words is "twenty trillion, seventy-two billion, sixty-two million, one hundred sixty-five thousand, five hundred twenty-one".