20451452552 has 16 divisors (see below), whose sum is σ = 38468990940. Its totient is φ = 10193054976.

The previous prime is 20451452519. The next prime is 20451452561. The reversal of 20451452552 is 25525415402.

It can be written as a sum of positive squares in 2 ways, for example, as 17861253316 + 2590199236 = 133646^2 + 50894^2 .

It is a super-2 number, since 2×20451452552² (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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081253 + ... + 4086260.

Almost surely, 2^20451452552 is an apocalyptic number.

It is an amenable number.

20451452552 is a deficient number, since it is larger than the sum of its proper divisors (18017538388).

20451452552 is a wasteful number, since it uses less digits than its factorization.

20451452552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167832 (or 8167828 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

Adding to 20451452552 its reverse (25525415402), we get a palindrome (45976867954).

The spelling of 20451452552 in words is "twenty billion, four hundred fifty-one million, four hundred fifty-two thousand, five hundred fifty-two".