21152542260562 has 32 divisors (see below), whose sum is σ = 32633954380080. Its totient is φ = 10278456115200.

The previous prime is 21152542260539. The next prime is 21152542260571. The reversal of 21152542260562 is 26506224525112.

It can be written as a sum of positive squares in 8 ways, for example, as 19768952320441 + 1383589940121 = 4446229^2 + 1176261^2 .

It is a super-2 number, since 2×21152542260562² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18625264 + ... + 19728292.

Almost surely, 2^{21152542260562} is an apocalyptic number.

21152542260562 is a deficient number, since it is larger than the sum of its proper divisors (11481412119518).

21152542260562 is a wasteful number, since it uses less digits than its factorization.

21152542260562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104798.

The product of its (nonzero) digits is 576000, while the sum is 43.

Adding to 21152542260562 its reverse (26506224525112), we get a palindrome (47658766785674).

The spelling of 21152542260562 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred forty-two million, two hundred sixty thousand, five hundred sixty-two".