21667211062 has 8 divisors (see below), whose sum is σ = 37143790416. Its totient is φ = 9285947592.

The previous prime is 21667211053. The next prime is 21667211081. The reversal of 21667211062 is 26011276612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773828953 + ... + 773828980.

It is an arithmetic number, because the mean of its divisors is an integer number (4642973802).

Almost surely, 2^21667211062 is an apocalyptic number.

21667211062 is a deficient number, since it is larger than the sum of its proper divisors (15476579354).

21667211062 is a wasteful number, since it uses less digits than its factorization.

21667211062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547657942.

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 21667211062 its reverse (26011276612), we get a palindrome (47678487674).

The spelling of 21667211062 in words is "twenty-one billion, six hundred sixty-seven million, two hundred eleven thousand, sixty-two".