20221620134365 has 16 divisors (see below), whose sum is σ = 26975540906496. Its totient is φ = 14451182625600.

The previous prime is 20221620134363. The next prime is 20221620134371. The reversal of 20221620134365 is 56343102612202.

It is not a de Polignac number, because 20221620134365 - 2¹ = 20221620134363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221620134363) 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, 5017769731 + ... + 5017773760.

It is an arithmetic number, because the mean of its divisors is an integer number (1685971306656).

Almost surely, 2^{20221620134365} is an apocalyptic number.

It is an amenable number.

20221620134365 is a deficient number, since it is larger than the sum of its proper divisors (6753920772131).

20221620134365 is a wasteful number, since it uses less digits than its factorization.

20221620134365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035543540.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 20221620134365 its reverse (56343102612202), we get a palindrome (76564722746567).

The spelling of 20221620134365 in words is "twenty trillion, two hundred twenty-one billion, six hundred twenty million, one hundred thirty-four thousand, three hundred sixty-five".