21151033343460 has 144 divisors (see below), whose sum is σ = 65412787737024. Its totient is φ = 5530120038144.

The previous prime is 21151033343449. The next prime is 21151033343501. The reversal of 21151033343460 is 6434333015112.

21151033343460 is a `hidden beast` number, since 2 + 1 + 151 + 0 + 3 + 3 + 3 + 43 + 460 = 666.

It is a super-2 number, since 2×21151033343460² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13400319 + ... + 14895321.

It is an arithmetic number, because the mean of its divisors is an integer number (454255470396).

Almost surely, 2^{21151033343460} is an apocalyptic number.

21151033343460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21151033343460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32706393868512).

21151033343460 is an abundant number, since it is smaller than the sum of its proper divisors (44261754393564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21151033343460 is a wasteful number, since it uses less digits than its factorization.

21151033343460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496554 (or 1496549 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 21151033343460 its reverse (6434333015112), we get a palindrome (27585366358572).

The spelling of 21151033343460 in words is "twenty-one trillion, one hundred fifty-one billion, thirty-three million, three hundred forty-three thousand, four hundred sixty".