21167216502 has 8 divisors (see below), whose sum is σ = 42334433016. Its totient is φ = 7055738832.

The previous prime is 21167216459. The next prime is 21167216509. The reversal of 21167216502 is 20561276112.

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

21167216502 is an admirable number.

It is a super-2 number, since 2×21167216502² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21167216509) 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, 1763934703 + ... + 1763934714.

It is an arithmetic number, because the mean of its divisors is an integer number (5291804127).

Almost surely, 2^21167216502 is an apocalyptic number.

21167216502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21167216502 is a wasteful number, since it uses less digits than its factorization.

21167216502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527869422.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 21167216502 in words is "twenty-one billion, one hundred sixty-seven million, two hundred sixteen thousand, five hundred two".