20215126 has 8 divisors (see below), whose sum is σ = 31918680. Its totient is φ = 9575568.

The previous prime is 20215109. The next prime is 20215133. The reversal of 20215126 is 62151202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 265951 + ... + 266026.

It is an arithmetic number, because the mean of its divisors is an integer number (3989835).

Almost surely, 2^20215126 is an apocalyptic number.

20215126 is a deficient number, since it is larger than the sum of its proper divisors (11703554).

20215126 is a wasteful number, since it uses less digits than its factorization.

20215126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531998.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20215126 is about 4496.1234413659. The cubic root of 20215126 is about 272.4115292296.

Adding to 20215126 its reverse (62151202), we get a palindrome (82366328).

The spelling of 20215126 in words is "twenty million, two hundred fifteen thousand, one hundred twenty-six".