21741806537202 has 64 divisors (see below), whose sum is σ = 47464847265024. Its totient is φ = 6612207912960.

The previous prime is 21741806537201. The next prime is 21741806537251. The reversal of 21741806537202 is 20273560814712.

It is a happy number.

It is a super-2 number, since 2×21741806537202² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21741806537201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15900438 + ... + 17213585.

It is an arithmetic number, because the mean of its divisors is an integer number (741638238516).

Almost surely, 2^{21741806537202} is an apocalyptic number.

21741806537202 is an abundant number, since it is smaller than the sum of its proper divisors (25723040727822).

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

21741806537202 is a wasteful number, since it uses less digits than its factorization.

21741806537202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33114243.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 21741806537202 in words is "twenty-one trillion, seven hundred forty-one billion, eight hundred six million, five hundred thirty-seven thousand, two hundred two".