21767240367132 has 96 divisors (see below), whose sum is σ = 54987695960064. Its totient is φ = 6662042899200.

The previous prime is 21767240367121. The next prime is 21767240367239. The reversal of 21767240367132 is 23176304276712.

It is a super-2 number, since 2×21767240367132² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 655406007 + ... + 655439217.

It is an arithmetic number, because the mean of its divisors is an integer number (572788499584).

Almost surely, 2^{21767240367132} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21767240367132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27493847980032).

21767240367132 is an abundant number, since it is smaller than the sum of its proper divisors (33220455592932).

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

21767240367132 is a wasteful number, since it uses less digits than its factorization.

21767240367132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55419 (or 55417 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 51.

The spelling of 21767240367132 in words is "twenty-one trillion, seven hundred sixty-seven billion, two hundred forty million, three hundred sixty-seven thousand, one hundred thirty-two".