20242240225 has 24 divisors (see below), whose sum is σ = 25507260288. Its totient is φ = 15932246400.

The previous prime is 20242240169. The next prime is 20242240241. The reversal of 20242240225 is 52204224202.

It is not a de Polignac number, because 20242240225 - 2¹³ = 20242232033 is a prime.

It is a super-4 number, since 4×20242240225⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20242240225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 852717 + ... + 876133.

It is an arithmetic number, because the mean of its divisors is an integer number (1062802512).

Almost surely, 2^20242240225 is an apocalyptic number.

20242240225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20242240225 is a deficient number, since it is larger than the sum of its proper divisors (5265020063).

20242240225 is a wasteful number, since it uses less digits than its factorization.

20242240225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23985 (or 23980 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 20242240225 its reverse (52204224202), we get a palindrome (72446464427).

The spelling of 20242240225 in words is "twenty billion, two hundred forty-two million, two hundred forty thousand, two hundred twenty-five".