20531441550015 has 48 divisors (see below), whose sum is σ = 38915306235936. Its totient is φ = 9930993004800.

The previous prime is 20531441550001. The next prime is 20531441550023. The reversal of 20531441550015 is 51005514413502.

20531441550015 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 144 + 1 + 5 + 500 + 1 + 5 = 666.

It is not a de Polignac number, because 20531441550015 - 2¹² = 20531441545919 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49052484 + ... + 49469273.

It is an arithmetic number, because the mean of its divisors is an integer number (810735546582).

Almost surely, 2^{20531441550015} is an apocalyptic number.

20531441550015 is a deficient number, since it is larger than the sum of its proper divisors (18383864685921).

20531441550015 is a wasteful number, since it uses less digits than its factorization.

20531441550015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98522200 (or 98522197 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

Adding to 20531441550015 its reverse (51005514413502), we get a palindrome (71536955963517).

The spelling of 20531441550015 in words is "twenty trillion, five hundred thirty-one billion, four hundred forty-one million, five hundred fifty thousand, fifteen".