20414436315551 has 4 divisors (see below), whose sum is σ = 20419608459432. Its totient is φ = 20409264171672.

The previous prime is 20414436315541. The next prime is 20414436315557. The reversal of 20414436315551 is 15551363441402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20414436315551 - 2¹⁴ = 20414436299167 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 (20414436315557) 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, 2586066020 + ... + 2586073913.

It is an arithmetic number, because the mean of its divisors is an integer number (5104902114858).

Almost surely, 2^{20414436315551} is an apocalyptic number.

20414436315551 is a deficient number, since it is larger than the sum of its proper divisors (5172143881).

20414436315551 is an equidigital number, since it uses as much as digits as its factorization.

20414436315551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172143880.

The product of its (nonzero) digits is 864000, while the sum is 44.

Adding to 20414436315551 its reverse (15551363441402), we get a palindrome (35965799756953).

The spelling of 20414436315551 in words is "twenty trillion, four hundred fourteen billion, four hundred thirty-six million, three hundred fifteen thousand, five hundred fifty-one".