20026436 has 6 divisors (see below), whose sum is σ = 35046270. Its totient is φ = 10013216.

The previous prime is 20026427. The next prime is 20026439. The reversal of 20026436 is 63462002.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 9424900 = 3256^2 + 3070^2 .

It is not an unprimeable number, because it can be changed into a prime (20026439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2503301 + ... + 2503308.

It is an arithmetic number, because the mean of its divisors is an integer number (5841045).

Almost surely, 2^20026436 is an apocalyptic number.

It is an amenable number.

20026436 is a deficient number, since it is larger than the sum of its proper divisors (15019834).

20026436 is a wasteful number, since it uses less digits than its factorization.

20026436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006613 (or 5006611 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20026436 is about 4475.0906136077. The cubic root of 20026436 is about 271.5613062438.

Adding to 20026436 its reverse (63462002), we get a palindrome (83488438).

The spelling of 20026436 in words is "twenty million, twenty-six thousand, four hundred thirty-six".