21865983552094 has 16 divisors (see below), whose sum is σ = 36455807913840. Its totient is φ = 9751553556160.

The previous prime is 21865983552029. The next prime is 21865983552097. The reversal of 21865983552094 is 49025538956812.

It is a super-2 number, since 2×21865983552094² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21865983552097) 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 7 ways as a sum of consecutive naturals, for example, 9376492639 + ... + 9376494970.

It is an arithmetic number, because the mean of its divisors is an integer number (2278487994615).

Almost surely, 2^{21865983552094} is an apocalyptic number.

21865983552094 is a deficient number, since it is larger than the sum of its proper divisors (14589824361746).

21865983552094 is a wasteful number, since it uses less digits than its factorization.

21865983552094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18752987675.

The product of its (nonzero) digits is 186624000, while the sum is 67.

The spelling of 21865983552094 in words is "twenty-one trillion, eight hundred sixty-five billion, nine hundred eighty-three million, five hundred fifty-two thousand, ninety-four".