20406464454115 has 4 divisors (see below), whose sum is σ = 24487757344944. Its totient is φ = 16325171563288.

The previous prime is 20406464454109. The next prime is 20406464454121. The reversal of 20406464454115 is 51145446460402.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20406464454109) and next prime (20406464454121).

It is a cyclic number.

It is not a de Polignac number, because 20406464454115 - 2⁵ = 20406464454083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040646445407 + ... + 2040646445416.

It is an arithmetic number, because the mean of its divisors is an integer number (6121939336236).

Almost surely, 2^{20406464454115} is an apocalyptic number.

20406464454115 is a deficient number, since it is larger than the sum of its proper divisors (4081292890829).

20406464454115 is an equidigital number, since it uses as much as digits as its factorization.

20406464454115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081292890828.

The product of its (nonzero) digits is 1843200, while the sum is 46.

The spelling of 20406464454115 in words is "twenty trillion, four hundred six billion, four hundred sixty-four million, four hundred fifty-four thousand, one hundred fifteen".