20215448 has 32 divisors (see below), whose sum is σ = 43785360. Its totient is φ = 8647680.

The previous prime is 20215417. The next prime is 20215451. The reversal of 20215448 is 84451202.

It is a happy 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, 5261 + ... + 8252.

Almost surely, 2^20215448 is an apocalyptic number.

It is an amenable number.

20215448 is an abundant number, since it is smaller than the sum of its proper divisors (23569912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20215448 is a wasteful number, since it uses less digits than its factorization.

20215448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13547 (or 13543 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 20215448 is about 4496.1592498487. The cubic root of 20215448 is about 272.4129756060.

It can be divided in two parts, 202154 and 48, that added together give a palindrome (202202).

The spelling of 20215448 in words is "twenty million, two hundred fifteen thousand, four hundred forty-eight".