21184150870 has 8 divisors (see below), whose sum is σ = 38131471584. Its totient is φ = 8473660344.

The previous prime is 21184150849. The next prime is 21184150877. The reversal of 21184150870 is 7805148112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21184150877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059207534 + ... + 1059207553.

It is an arithmetic number, because the mean of its divisors is an integer number (4766433948).

Almost surely, 2^21184150870 is an apocalyptic number.

21184150870 is a deficient number, since it is larger than the sum of its proper divisors (16947320714).

21184150870 is a wasteful number, since it uses less digits than its factorization.

21184150870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118415094.

The product of its (nonzero) digits is 17920, while the sum is 37.

Adding to 21184150870 its reverse (7805148112), we get a palindrome (28989298982).

The spelling of 21184150870 in words is "twenty-one billion, one hundred eighty-four million, one hundred fifty thousand, eight hundred seventy".