21495181476 has 12 divisors (see below), whose sum is σ = 50155423472. Its totient is φ = 7165060488.

The previous prime is 21495181469. The next prime is 21495181483. The reversal of 21495181476 is 67418159412.

It is an interprime number because it is at equal distance from previous prime (21495181469) and next prime (21495181483).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895632550 + ... + 895632573.

Almost surely, 2^21495181476 is an apocalyptic number.

It is an amenable number.

21495181476 is an abundant number, since it is smaller than the sum of its proper divisors (28660241996).

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

21495181476 is a wasteful number, since it uses less digits than its factorization.

21495181476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791265130 (or 1791265128 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The spelling of 21495181476 in words is "twenty-one billion, four hundred ninety-five million, one hundred eighty-one thousand, four hundred seventy-six".