20642200252 has 6 divisors (see below), whose sum is σ = 36123850448. Its totient is φ = 10321100124.

The previous prime is 20642200199. The next prime is 20642200273. The reversal of 20642200252 is 25200224602.

It is a happy number.

It is a super-2 number, since 2×20642200252² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2580275028 + ... + 2580275035.

Almost surely, 2^20642200252 is an apocalyptic number.

It is an amenable number.

20642200252 is a deficient number, since it is larger than the sum of its proper divisors (15481650196).

20642200252 is a wasteful number, since it uses less digits than its factorization.

20642200252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160550067 (or 5160550065 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20642200252 its reverse (25200224602), we get a palindrome (45842424854).

The spelling of 20642200252 in words is "twenty billion, six hundred forty-two million, two hundred thousand, two hundred fifty-two".