20360631645461 has 4 divisors (see below), whose sum is σ = 20360669836800. Its totient is φ = 20360593454124.

The previous prime is 20360631645449. The next prime is 20360631645509. The reversal of 20360631645461 is 16454613606302.

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 a cyclic number.

It is not a de Polignac number, because 20360631645461 - 2¹⁴ = 20360631629077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20360631615461) 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, 18284501 + ... + 19366058.

It is an arithmetic number, because the mean of its divisors is an integer number (5090167459200).

Almost surely, 2^{20360631645461} is an apocalyptic number.

It is an amenable number.

20360631645461 is a deficient number, since it is larger than the sum of its proper divisors (38191339).

20360631645461 is an equidigital number, since it uses as much as digits as its factorization.

20360631645461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38191338.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 20360631645461 in words is "twenty trillion, three hundred sixty billion, six hundred thirty-one million, six hundred forty-five thousand, four hundred sixty-one".