20442415545 has 12 divisors (see below), whose sum is σ = 35433520356. Its totient is φ = 10902621600.

The previous prime is 20442415519. The next prime is 20442415547. The reversal of 20442415545 is 54551424402.

20442415545 is a `hidden beast` number, since 20 + 4 + 42 + 41 + 554 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13490357904 + 6952057641 = 116148^2 + 83379^2 .

It is not a de Polignac number, because 20442415545 - 2¹³ = 20442407353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20442415547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227137906 + ... + 227137995.

It is an arithmetic number, because the mean of its divisors is an integer number (2952793363).

Almost surely, 2^20442415545 is an apocalyptic number.

It is an amenable number.

20442415545 is a deficient number, since it is larger than the sum of its proper divisors (14991104811).

20442415545 is a wasteful number, since it uses less digits than its factorization.

20442415545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454275912 (or 454275909 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 20442415545 its reverse (54551424402), we get a palindrome (74993839947).

The spelling of 20442415545 in words is "twenty billion, four hundred forty-two million, four hundred fifteen thousand, five hundred forty-five".