20436036225 has 48 divisors (see below), whose sum is σ = 38048231424. Its totient is φ = 9588744000.

The previous prime is 20436036167. The next prime is 20436036227. The reversal of 20436036225 is 52263063402.

It is not a de Polignac number, because 20436036225 - 2¹⁴ = 20436019841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20436036227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 373957 + ... + 425106.

It is an arithmetic number, because the mean of its divisors is an integer number (792671488).

Almost surely, 2^20436036225 is an apocalyptic number.

20436036225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20436036225 is a deficient number, since it is larger than the sum of its proper divisors (17612195199).

20436036225 is a wasteful number, since it uses less digits than its factorization.

20436036225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799118 (or 799113 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 20436036225 its reverse (52263063402), we get a palindrome (72699099627).

The spelling of 20436036225 in words is "twenty billion, four hundred thirty-six million, thirty-six thousand, two hundred twenty-five".