20461013650165 has 24 divisors (see below), whose sum is σ = 28575790006680. Its totient is φ = 14005399710720.

The previous prime is 20461013650139. The next prime is 20461013650283. The reversal of 20461013650165 is 56105631016402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1610845794481 + 18850167855684 = 1269191^2 + 4341678^2 .

It is not a de Polignac number, because 20461013650165 - 2²⁷ = 20460879432437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 994691400 + ... + 994711969.

It is an arithmetic number, because the mean of its divisors is an integer number (1190657916945).

Almost surely, 2^{20461013650165} is an apocalyptic number.

It is an amenable number.

20461013650165 is a deficient number, since it is larger than the sum of its proper divisors (8114776356515).

20461013650165 is a wasteful number, since it uses less digits than its factorization.

20461013650165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989403413 (or 1989403402 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 20461013650165 its reverse (56105631016402), we get a palindrome (76566644666567).

The spelling of 20461013650165 in words is "twenty trillion, four hundred sixty-one billion, thirteen million, six hundred fifty thousand, one hundred sixty-five".