20450165321641 has 16 divisors (see below), whose sum is σ = 24383567835648. Its totient is φ = 16933033209600.

The previous prime is 20450165321567. The next prime is 20450165321653. The reversal of 20450165321641 is 14612356105402.

It is a cyclic number.

It is not a de Polignac number, because 20450165321641 - 2¹⁷ = 20450165190569 is a prime.

It is a super-3 number, since 3×20450165321641³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20450165321594 and 20450165321603.

It is not an unprimeable number, because it can be changed into a prime (20450165321671) 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, 1763851830 + ... + 1763863423.

It is an arithmetic number, because the mean of its divisors is an integer number (1523972989728).

Almost surely, 2^{20450165321641} is an apocalyptic number.

It is an amenable number.

20450165321641 is a deficient number, since it is larger than the sum of its proper divisors (3933402514007).

20450165321641 is a wasteful number, since it uses less digits than its factorization.

20450165321641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527715312.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 20450165321641 in words is "twenty trillion, four hundred fifty billion, one hundred sixty-five million, three hundred twenty-one thousand, six hundred forty-one".