20012215445 has 8 divisors (see below), whose sum is σ = 24017022936. Its totient is φ = 16008196096.

The previous prime is 20012215409. The next prime is 20012215459. The reversal of 20012215445 is 54451221002.

It can be written as a sum of positive squares in 4 ways, for example, as 2729958001 + 17282257444 = 52249^2 + 131462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20012215445 - 2⁶ = 20012215381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139652 + ... + 243981.

It is an arithmetic number, because the mean of its divisors is an integer number (3002127867).

Almost surely, 2^20012215445 is an apocalyptic number.

It is an amenable number.

20012215445 is a deficient number, since it is larger than the sum of its proper divisors (4004807491).

20012215445 is a wasteful number, since it uses less digits than its factorization.

20012215445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394071.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 20012215445 its reverse (54451221002), we get a palindrome (74463436447).

The spelling of 20012215445 in words is "twenty billion, twelve million, two hundred fifteen thousand, four hundred forty-five".