20211452015 has 4 divisors (see below), whose sum is σ = 24253742424. Its totient is φ = 16169161608.

The previous prime is 20211451999. The next prime is 20211452017. The reversal of 20211452015 is 51025411202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20211452015 - 2⁴ = 20211451999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211452017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021145197 + ... + 2021145206.

It is an arithmetic number, because the mean of its divisors is an integer number (6063435606).

Almost surely, 2^20211452015 is an apocalyptic number.

20211452015 is a deficient number, since it is larger than the sum of its proper divisors (4042290409).

20211452015 is an equidigital number, since it uses as much as digits as its factorization.

20211452015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042290408.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 20211452015 its reverse (51025411202), we get a palindrome (71236863217).

The spelling of 20211452015 in words is "twenty billion, two hundred eleven million, four hundred fifty-two thousand, fifteen".