21700429159444 has 24 divisors (see below), whose sum is σ = 43401190521920. Its totient is φ = 9300112739136.

The previous prime is 21700429159411. The next prime is 21700429159463. The reversal of 21700429159444 is 44495192400712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21700429159391 and 21700429159400.

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, 843127 + ... + 6641665.

Almost surely, 2^{21700429159444} is an apocalyptic number.

It is an amenable number.

21700429159444 is an abundant number, since it is smaller than the sum of its proper divisors (21700761362476).

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

21700429159444 is a wasteful number, since it uses less digits than its factorization.

21700429159444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932207 (or 5932205 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 21700429159444 in words is "twenty-one trillion, seven hundred billion, four hundred twenty-nine million, one hundred fifty-nine thousand, four hundred forty-four".