18641251010 has 16 divisors (see below), whose sum is σ = 33556231800. Its totient is φ = 7456060416.

The previous prime is 18641250973. The next prime is 18641251033. The reversal of 18641251010 is 1015214681.

It can be written as a sum of positive squares in 4 ways, for example, as 12282623929 + 6358627081 = 110827^2 + 79741^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164756 + ... + 253824.

Almost surely, 2^18641251010 is an apocalyptic number.

18641251010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18641251010 is a deficient number, since it is larger than the sum of its proper divisors (14914980790).

18641251010 is a wasteful number, since it uses less digits than its factorization.

18641251010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110005.

The product of its (nonzero) digits is 1920, while the sum is 29.

Adding to 18641251010 its reverse (1015214681), we get a palindrome (19656465691).

The spelling of 18641251010 in words is "eighteen billion, six hundred forty-one million, two hundred fifty-one thousand, ten".