20001355252 has 24 divisors (see below), whose sum is σ = 36850533440. Its totient is φ = 9472800960.

The previous prime is 20001355249. The next prime is 20001355267. The reversal of 20001355252 is 25255310002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557233 + ... + 592039.

Almost surely, 2^20001355252 is an apocalyptic number.

It is an amenable number.

20001355252 is a deficient number, since it is larger than the sum of its proper divisors (16849178188).

20001355252 is a wasteful number, since it uses less digits than its factorization.

20001355252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42391 (or 42389 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20001355252 its reverse (25255310002), we get a palindrome (45256665254).

The spelling of 20001355252 in words is "twenty billion, one million, three hundred fifty-five thousand, two hundred fifty-two".