20218479 has 12 divisors (see below), whose sum is σ = 27859608. Its totient is φ = 13042320.

The previous prime is 20218477. The next prime is 20218529. The reversal of 20218479 is 97481202.

It is a happy number.

It is not a de Polignac number, because 20218479 - 2¹ = 20218477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 624 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (2321634).

Almost surely, 2^20218479 is an apocalyptic number.

20218479 is a deficient number, since it is larger than the sum of its proper divisors (7641129).

20218479 is an equidigital number, since it uses as much as digits as its factorization.

20218479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7078 (or 7047 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20218479 is about 4496.4963026783. The cubic root of 20218479 is about 272.4265896578.

It can be divided in two parts, 202 and 18479, that added together give a palindrome (18681).

The spelling of 20218479 in words is "twenty million, two hundred eighteen thousand, four hundred seventy-nine".