21612640167032 has 32 divisors (see below), whose sum is σ = 41910899335680. Its totient is φ = 10437733392480.

The previous prime is 21612640166983. The next prime is 21612640167103. The reversal of 21612640167032 is 23076104621612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83185538 + ... + 83444945.

It is an arithmetic number, because the mean of its divisors is an integer number (1309715604240).

Almost surely, 2^{21612640167032} is an apocalyptic number.

It is an amenable number.

21612640167032 is a deficient number, since it is larger than the sum of its proper divisors (20298259168648).

21612640167032 is a wasteful number, since it uses less digits than its factorization.

21612640167032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166631043 (or 166631039 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

Adding to 21612640167032 its reverse (23076104621612), we get a palindrome (44688744788644).

The spelling of 21612640167032 in words is "twenty-one trillion, six hundred twelve billion, six hundred forty million, one hundred sixty-seven thousand, thirty-two".