21901320088 has 16 divisors (see below), whose sum is σ = 41084010360. Its totient is φ = 10945584000.

The previous prime is 21901320073. The next prime is 21901320097. The reversal of 21901320088 is 88002310912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616138 + ... + 650713.

Almost surely, 2^21901320088 is an apocalyptic number.

It is an amenable number.

21901320088 is a deficient number, since it is larger than the sum of its proper divisors (19182690272).

21901320088 is a wasteful number, since it uses less digits than its factorization.

21901320088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269018 (or 1269014 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 21901320088 in words is "twenty-one billion, nine hundred one million, three hundred twenty thousand, eighty-eight".