21860516626846 has 16 divisors (see below), whose sum is σ = 32798075558976. Its totient is φ = 10927825055136.

The previous prime is 21860516626841. The next prime is 21860516626849. The reversal of 21860516626846 is 64862661506812.

It is a super-2 number, since 2×21860516626846² (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 (21860516626841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180117835 + ... + 180239161.

It is an arithmetic number, because the mean of its divisors is an integer number (2049879722436).

Almost surely, 2^{21860516626846} is an apocalyptic number.

21860516626846 is a deficient number, since it is larger than the sum of its proper divisors (10937558932130).

21860516626846 is a wasteful number, since it uses less digits than its factorization.

21860516626846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140643.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 21860516626846 in words is "twenty-one trillion, eight hundred sixty billion, five hundred sixteen million, six hundred twenty-six thousand, eight hundred forty-six".