20532215 has 16 divisors (see below), whose sum is σ = 28048896. Its totient is φ = 14282400.

The previous prime is 20532191. The next prime is 20532227. The reversal of 20532215 is 51223502.

It is not a de Polignac number, because 20532215 - 2¹⁶ = 20466679 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 15 ways as a sum of consecutive naturals, for example, 6851 + ... + 9380.

It is an arithmetic number, because the mean of its divisors is an integer number (1753056).

Almost surely, 2^20532215 is an apocalyptic number.

20532215 is a deficient number, since it is larger than the sum of its proper divisors (7516681).

20532215 is a wasteful number, since it uses less digits than its factorization.

20532215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16270.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20532215 is about 4531.2487241378. The cubic root of 20532215 is about 273.8284707938.

Adding to 20532215 its reverse (51223502), we get a palindrome (71755717).

It can be divided in two parts, 20 and 532215, that added together give a palindrome (532235).

The spelling of 20532215 in words is "twenty million, five hundred thirty-two thousand, two hundred fifteen".