21043271466 has 48 divisors (see below), whose sum is σ = 55172280384. Its totient is φ = 5658694272.

The previous prime is 21043271429. The next prime is 21043271467. The reversal of 21043271466 is 66417234012.

21043271466 is a `hidden beast` number, since 210 + 432 + 7 + 1 + 4 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21043271466.

It is not an unprimeable number, because it can be changed into a prime (21043271467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4909920 + ... + 4914203.

It is an arithmetic number, because the mean of its divisors is an integer number (1149422508).

Almost surely, 2^21043271466 is an apocalyptic number.

21043271466 is an abundant number, since it is smaller than the sum of its proper divisors (34129008918).

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

21043271466 is a wasteful number, since it uses less digits than its factorization.

21043271466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9824155 (or 9824152 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21043271466 in words is "twenty-one billion, forty-three million, two hundred seventy-one thousand, four hundred sixty-six".