20610445771145 has 4 divisors (see below), whose sum is σ = 24732534925380. Its totient is φ = 16488356616912.

The previous prime is 20610445771129. The next prime is 20610445771169. The reversal of 20610445771145 is 54117754401602.

It is a happy number.

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 2590734899776 + 18019710871369 = 1609576^2 + 4244963^2 .

It is a cyclic number.

It is not a de Polignac number, because 20610445771145 - 2⁴ = 20610445771129 is a prime.

It is a super-2 number, since 2×20610445771145² (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 20610445771145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061044577110 + ... + 2061044577119.

It is an arithmetic number, because the mean of its divisors is an integer number (6183133731345).

Almost surely, 2^{20610445771145} is an apocalyptic number.

It is an amenable number.

20610445771145 is a deficient number, since it is larger than the sum of its proper divisors (4122089154235).

20610445771145 is an equidigital number, since it uses as much as digits as its factorization.

20610445771145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122089154234.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 20610445771145 in words is "twenty trillion, six hundred ten billion, four hundred forty-five million, seven hundred seventy-one thousand, one hundred forty-five".