21152851170 has 64 divisors (see below), whose sum is σ = 55930435200. Its totient is φ = 5077184000.

The previous prime is 21152851133. The next prime is 21152851201. The reversal of 21152851170 is 7115825112.

It is a super-2 number, since 2×21152851170² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283995 + ... + 350654.

It is an arithmetic number, because the mean of its divisors is an integer number (873913050).

Almost surely, 2^21152851170 is an apocalyptic number.

21152851170 is an abundant number, since it is smaller than the sum of its proper divisors (34777584030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21152851170 is a wasteful number, since it uses less digits than its factorization.

21152851170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634771.

The product of its (nonzero) digits is 5600, while the sum is 33.

The spelling of 21152851170 in words is "twenty-one billion, one hundred fifty-two million, eight hundred fifty-one thousand, one hundred seventy".