21022670016 has 140 divisors (see below), whose sum is σ = 65983808088. Its totient is φ = 6595319808.

The previous prime is 21022669979. The next prime is 21022670021. The reversal of 21022670016 is 61007622012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31146 + ... + 207401.

Almost surely, 2^21022670016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022670016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32991904044).

21022670016 is an abundant number, since it is smaller than the sum of its proper divisors (44961138072).

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

21022670016 is a wasteful number, since it uses less digits than its factorization.

21022670016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238588 (or 238569 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The spelling of 21022670016 in words is "twenty-one billion, twenty-two million, six hundred seventy thousand, sixteen".