21160216470 has 64 divisors (see below), whose sum is σ = 51469634304. Its totient is φ = 5567103360.

The previous prime is 21160216433. The next prime is 21160216529. The reversal of 21160216470 is 7461206112.

It is a super-2 number, since 2×21160216470² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664329 + ... + 695451.

It is an arithmetic number, because the mean of its divisors is an integer number (804213036).

Almost surely, 2^21160216470 is an apocalyptic number.

21160216470 is an abundant number, since it is smaller than the sum of its proper divisors (30309417834).

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

21160216470 is a wasteful number, since it uses less digits than its factorization.

21160216470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31437.

The product of its (nonzero) digits is 4032, while the sum is 30.

The spelling of 21160216470 in words is "twenty-one billion, one hundred sixty million, two hundred sixteen thousand, four hundred seventy".