21085763270 has 96 divisors (see below), whose sum is σ = 45682825824. Its totient is φ = 6943872000.

The previous prime is 21085763263. The next prime is 21085763287. The reversal of 21085763270 is 7236758012.

It is a super-3 number, since 3×21085763270³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

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 47 ways as a sum of consecutive naturals, for example, 974570 + ... + 995970.

It is an arithmetic number, because the mean of its divisors is an integer number (475862769).

Almost surely, 2^21085763270 is an apocalyptic number.

21085763270 is an abundant number, since it is smaller than the sum of its proper divisors (24597062554).

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

21085763270 is a wasteful number, since it uses less digits than its factorization.

21085763270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21498 (or 21485 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 21085763270 in words is "twenty-one billion, eighty-five million, seven hundred sixty-three thousand, two hundred seventy".