20312651613541 has 4 divisors (see below), whose sum is σ = 23214458986912. Its totient is φ = 17410844240172.

The previous prime is 20312651613539. The next prime is 20312651613559. The reversal of 20312651613541 is 14531615621302.

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 20312651613541 - 2¹ = 20312651613539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312651613494 and 20312651613503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312651613511) 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, 1450903686675 + ... + 1450903686688.

It is an arithmetic number, because the mean of its divisors is an integer number (5803614746728).

Almost surely, 2^{20312651613541} is an apocalyptic number.

It is an amenable number.

20312651613541 is a deficient number, since it is larger than the sum of its proper divisors (2901807373371).

20312651613541 is an equidigital number, since it uses as much as digits as its factorization.

20312651613541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901807373370.

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

The spelling of 20312651613541 in words is "twenty trillion, three hundred twelve billion, six hundred fifty-one million, six hundred thirteen thousand, five hundred forty-one".