20445415455 has 32 divisors (see below), whose sum is σ = 32817597120. Its totient is φ = 10869309440.

The previous prime is 20445415453. The next prime is 20445415477. The reversal of 20445415455 is 55451454402.

It is not a de Polignac number, because 20445415455 - 2¹ = 20445415453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445415453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7835191 + ... + 7837799.

It is an arithmetic number, because the mean of its divisors is an integer number (1025549910).

Almost surely, 2^20445415455 is an apocalyptic number.

20445415455 is a deficient number, since it is larger than the sum of its proper divisors (12372181665).

20445415455 is a wasteful number, since it uses less digits than its factorization.

20445415455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091.

The product of its (nonzero) digits is 320000, while the sum is 39.

Adding to 20445415455 its reverse (55451454402), we get a palindrome (75896869857).

The spelling of 20445415455 in words is "twenty billion, four hundred forty-five million, four hundred fifteen thousand, four hundred fifty-five".