21497827067706 has 32 divisors (see below), whose sum is σ = 46911079466496. Its totient is φ = 6513558398000.

The previous prime is 21497827067687. The next prime is 21497827067711. The reversal of 21497827067706 is 60776072879412.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22902750 + ... + 23822921.

It is an arithmetic number, because the mean of its divisors is an integer number (1465971233328).

Almost surely, 2^{21497827067706} is an apocalyptic number.

21497827067706 is an abundant number, since it is smaller than the sum of its proper divisors (25413252398790).

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

21497827067706 is a wasteful number, since it uses less digits than its factorization.

21497827067706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46732658.

The product of its (nonzero) digits is 99574272, while the sum is 66.

The spelling of 21497827067706 in words is "twenty-one trillion, four hundred ninety-seven billion, eight hundred twenty-seven million, sixty-seven thousand, seven hundred six".