21861024189010 has 32 divisors (see below), whose sum is σ = 39504048296112. Its totient is φ = 8710143836160.

The previous prime is 21861024188999. The next prime is 21861024189031. The reversal of 21861024189010 is 1098142016812.

It can be written as a sum of positive squares in 8 ways, for example, as 21137107395121 + 723916793889 = 4597511^2 + 850833^2 .

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, 114580654 + ... + 114771286.

Almost surely, 2^{21861024189010} is an apocalyptic number.

21861024189010 is a deficient number, since it is larger than the sum of its proper divisors (17643024107102).

21861024189010 is a wasteful number, since it uses less digits than its factorization.

21861024189010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235518.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 21861024189010 in words is "twenty-one trillion, eight hundred sixty-one billion, twenty-four million, one hundred eighty-nine thousand, ten".