21426054466 has 8 divisors (see below), whose sum is σ = 32188301244. Its totient is φ = 10696620720.

The previous prime is 21426054451. The next prime is 21426054469. The reversal of 21426054466 is 66445062412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20748962025 + 677092441 = 144045^2 + 26021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21426054469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8201625 + ... + 8204236.

Almost surely, 2^21426054466 is an apocalyptic number.

21426054466 is a deficient number, since it is larger than the sum of its proper divisors (10762246778).

21426054466 is a wasteful number, since it uses less digits than its factorization.

21426054466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16406516.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 21426054466 in words is "twenty-one billion, four hundred twenty-six million, fifty-four thousand, four hundred sixty-six".