21950552243586 has 32 divisors (see below), whose sum is σ = 44291306305728. Its totient is φ = 7251822072320.

The previous prime is 21950552243527. The next prime is 21950552243591. The reversal of 21950552243586 is 68534225505912.

It is a happy number.

It is a Curzon number.

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, 17483005 + ... + 18696431.

It is an arithmetic number, because the mean of its divisors is an integer number (1384103322054).

Almost surely, 2^{21950552243586} is an apocalyptic number.

21950552243586 is an abundant number, since it is smaller than the sum of its proper divisors (22340754062142).

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

21950552243586 is a wasteful number, since it uses less digits than its factorization.

21950552243586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240226.

The product of its (nonzero) digits is 25920000, while the sum is 57.

The spelling of 21950552243586 in words is "twenty-one trillion, nine hundred fifty billion, five hundred fifty-two million, two hundred forty-three thousand, five hundred eighty-six".