20155000552 has 8 divisors (see below), whose sum is σ = 37790626050. Its totient is φ = 10077500272.

The previous prime is 20155000543. The next prime is 20155000583. The reversal of 20155000552 is 25500055102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18979470756 + 1175529796 = 137766^2 + 34286^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20155000552² (a number of 21 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 1259687527 + ... + 1259687542.

Almost surely, 2^20155000552 is an apocalyptic number.

It is an amenable number.

20155000552 is a deficient number, since it is larger than the sum of its proper divisors (17635625498).

20155000552 is a wasteful number, since it uses less digits than its factorization.

20155000552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519375075 (or 2519375071 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

Adding to 20155000552 its reverse (25500055102), we get a palindrome (45655055654).

The spelling of 20155000552 in words is "twenty billion, one hundred fifty-five million, five hundred fifty-two", and thus it is an aban number.