21088070016 has 64 divisors (see below), whose sum is σ = 60324060720. Its totient is φ = 6488635392.

The previous prime is 21088070009. The next prime is 21088070021. The reversal of 21088070016 is 61007088012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 2107195 + ... + 2117178.

Almost surely, 2^21088070016 is an apocalyptic number.

21088070016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21088070016 is an abundant number, since it is smaller than the sum of its proper divisors (39235990704).

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

21088070016 is a wasteful number, since it uses less digits than its factorization.

21088070016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224403 (or 4224391 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The spelling of 21088070016 in words is "twenty-one billion, eighty-eight million, seventy thousand, sixteen".