20215484 has 12 divisors (see below), whose sum is σ = 35435400. Its totient is φ = 10091088.

The previous prime is 20215463. The next prime is 20215513. The reversal of 20215484 is 48451202.

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 3 ways as a sum of consecutive naturals, for example, 1199 + ... + 6470.

It is an arithmetic number, because the mean of its divisors is an integer number (2952950).

Almost surely, 2^20215484 is an apocalyptic number.

It is an amenable number.

20215484 is a deficient number, since it is larger than the sum of its proper divisors (15219916).

20215484 is a wasteful number, since it uses less digits than its factorization.

20215484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332 (or 8330 counting only the distinct ones).

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

The square root of 20215484 is about 4496.1632532638. The cubic root of 20215484 is about 272.4131373117.

Adding to 20215484 its reverse (48451202), we get a palindrome (68666686).

The spelling of 20215484 in words is "twenty million, two hundred fifteen thousand, four hundred eighty-four".