21006299059380 has 72 divisors (see below), whose sum is σ = 63735083029800. Its totient is φ = 5600275276032.

The previous prime is 21006299059379. The next prime is 21006299059387. The reversal of 21006299059380 is 8395099260012.

It is a happy number.

21006299059380 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 629 + 9 + 0 + 5 + 9 + 3 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 879716436624 + 20126582622756 = 937932^2 + 4486266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21006299059387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13909915 + ... + 15345954.

It is an arithmetic number, because the mean of its divisors is an integer number (885209486525).

Almost surely, 2^{21006299059380} is an apocalyptic number.

21006299059380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21006299059380 is an abundant number, since it is smaller than the sum of its proper divisors (42728783970420).

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

21006299059380 is a wasteful number, since it uses less digits than its factorization.

21006299059380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29259873 (or 29259868 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 21006299059380 in words is "twenty-one trillion, six billion, two hundred ninety-nine million, fifty-nine thousand, three hundred eighty".