20651032144 has 40 divisors (see below), whose sum is σ = 40273437960. Its totient is φ = 10257980928.

The previous prime is 20651032139. The next prime is 20651032163. The reversal of 20651032144 is 44123015602.

It can be written as a sum of positive squares in 4 ways, for example, as 17061584400 + 3589447744 = 130620^2 + 59912^2 .

It is a super-2 number, since 2×20651032144² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5614434 + ... + 5618110.

It is an arithmetic number, because the mean of its divisors is an integer number (1006835949).

Almost surely, 2^20651032144 is an apocalyptic number.

It is an amenable number.

20651032144 is a deficient number, since it is larger than the sum of its proper divisors (19622405816).

20651032144 is a wasteful number, since it uses less digits than its factorization.

20651032144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5887 (or 5881 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20651032144 its reverse (44123015602), we get a palindrome (64774047746).

The spelling of 20651032144 in words is "twenty billion, six hundred fifty-one million, thirty-two thousand, one hundred forty-four".