21035451440144 has 10 divisors (see below), whose sum is σ = 40756187165310. Its totient is φ = 10517725720064.

The previous prime is 21035451440093. The next prime is 21035451440167. The reversal of 21035451440144 is 44104415453012.

It can be written as a sum of positive squares in only one way, i.e., 20506515241744 + 528936198400 = 4528412^2 + 727280^2 .

It is a super-2 number, since 2×21035451440144² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21035451440098 and 21035451440107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657357857489 + ... + 657357857520.

It is an arithmetic number, because the mean of its divisors is an integer number (4075618716531).

Almost surely, 2^{21035451440144} is an apocalyptic number.

It is an amenable number.

21035451440144 is a deficient number, since it is larger than the sum of its proper divisors (19720735725166).

21035451440144 is a wasteful number, since it uses less digits than its factorization.

21035451440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314715715017 (or 1314715715011 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 21035451440144 its reverse (44104415453012), we get a palindrome (65139866893156).

The spelling of 21035451440144 in words is "twenty-one trillion, thirty-five billion, four hundred fifty-one million, four hundred forty thousand, one hundred forty-four".