20215026 has 24 divisors (see below), whose sum is σ = 47168940. Its totient is φ = 6219936.

The previous prime is 20215021. The next prime is 20215033. The reversal of 20215026 is 62051202.

It can be written as a sum of positive squares in 2 ways, for example, as 15992001 + 4223025 = 3999^2 + 2055^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20215021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42961 + ... + 43428.

Almost surely, 2^20215026 is an apocalyptic number.

20215026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20215026 is an abundant number, since it is smaller than the sum of its proper divisors (26953914).

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

20215026 is a wasteful number, since it uses less digits than its factorization.

20215026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86410 (or 86407 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20215026 is about 4496.1123206610. The cubic root of 20215026 is about 272.4110800412.

Adding to 20215026 its reverse (62051202), we get a palindrome (82266228).

The spelling of 20215026 in words is "twenty million, two hundred fifteen thousand, twenty-six".