21395476795256 has 8 divisors (see below), whose sum is σ = 40116518991120. Its totient is φ = 10697738397624.

The previous prime is 21395476795219. The next prime is 21395476795337. The reversal of 21395476795256 is 65259767459312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21395476795256² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21395476795256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1337217299696 + ... + 1337217299711.

It is an arithmetic number, because the mean of its divisors is an integer number (5014564873890).

Almost surely, 2^{21395476795256} is an apocalyptic number.

It is an amenable number.

21395476795256 is a deficient number, since it is larger than the sum of its proper divisors (18721042195864).

21395476795256 is a wasteful number, since it uses less digits than its factorization.

21395476795256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674434599413 (or 2674434599409 counting only the distinct ones).

The product of its digits is 857304000, while the sum is 71.

The spelling of 21395476795256 in words is "twenty-one trillion, three hundred ninety-five billion, four hundred seventy-six million, seven hundred ninety-five thousand, two hundred fifty-six".