21285060335650 has 24 divisors (see below), whose sum is σ = 39590361272340. Its totient is φ = 8513992080960.

The previous prime is 21285060335641. The next prime is 21285060335653. The reversal of 21285060335650 is 5653306058212.

It can be written as a sum of positive squares in 6 ways, for example, as 8200989605169 + 13084070730481 = 2863737^2 + 3617191^2 .

It is a super-3 number, since 3×21285060335650³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21285060335650.

It is not an unprimeable number, because it can be changed into a prime (21285060335653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16172172 + ... + 17438728.

Almost surely, 2^{21285060335650} is an apocalyptic number.

21285060335650 is a deficient number, since it is larger than the sum of its proper divisors (18305300936690).

21285060335650 is a wasteful number, since it uses less digits than its factorization.

21285060335650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602678 (or 1602673 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 21285060335650 in words is "twenty-one trillion, two hundred eighty-five billion, sixty million, three hundred thirty-five thousand, six hundred fifty".