21166051062 has 128 divisors (see below), whose sum is σ = 47348001792. Its totient is φ = 6267456000.

The previous prime is 21166051043. The next prime is 21166051087. The reversal of 21166051062 is 26015066112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68057887 + ... + 68058197.

It is an arithmetic number, because the mean of its divisors is an integer number (369906264).

Almost surely, 2^21166051062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21166051062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23674000896).

21166051062 is an abundant number, since it is smaller than the sum of its proper divisors (26181950730).

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

21166051062 is a wasteful number, since it uses less digits than its factorization.

21166051062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 21166051062 in words is "twenty-one billion, one hundred sixty-six million, fifty-one thousand, sixty-two".