20455041215 has 16 divisors (see below), whose sum is σ = 28126663680. Its totient is φ = 13989296160.

The previous prime is 20455041197. The next prime is 20455041239. The reversal of 20455041215 is 51214055402.

It is not a de Polignac number, because 20455041215 - 2⁸ = 20455040959 is a prime.

It is a super-2 number, since 2×20455041215² (a number of 21 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757751 + ... + 784280.

It is an arithmetic number, because the mean of its divisors is an integer number (1757916480).

Almost surely, 2^20455041215 is an apocalyptic number.

20455041215 is a deficient number, since it is larger than the sum of its proper divisors (7671622465).

20455041215 is a wasteful number, since it uses less digits than its factorization.

20455041215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542422.

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 20455041215 its reverse (51214055402), we get a palindrome (71669096617).

The spelling of 20455041215 in words is "twenty billion, four hundred fifty-five million, forty-one thousand, two hundred fifteen".