20454431205015 has 12 divisors (see below), whose sum is σ = 35454347422104. Its totient is φ = 10909029975984.

The previous prime is 20454431204983. The next prime is 20454431205041. The reversal of 20454431205015 is 51050213445402.

20454431205015 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 4 + 431 + 205 + 0 + 15 = 666.

It is not a de Polignac number, because 20454431205015 - 2⁵ = 20454431204983 is a prime.

It is a super-2 number, since 2×20454431205015² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227271457789 + ... + 227271457878.

It is an arithmetic number, because the mean of its divisors is an integer number (2954528951842).

Almost surely, 2^{20454431205015} is an apocalyptic number.

20454431205015 is a deficient number, since it is larger than the sum of its proper divisors (14999916217089).

20454431205015 is a wasteful number, since it uses less digits than its factorization.

20454431205015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454542915678 (or 454542915675 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 20454431205015 in words is "twenty trillion, four hundred fifty-four billion, four hundred thirty-one million, two hundred five thousand, fifteen".