21343555466 has 4 divisors (see below), whose sum is σ = 32015333202. Its totient is φ = 10671777732.

The previous prime is 21343555463. The next prime is 21343555507. The reversal of 21343555466 is 66455534312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13437678241 + 7905877225 = 115921^2 + 88915^2 .

It is not an unprimeable number, because it can be changed into a prime (21343555463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5335888865 + ... + 5335888868.

Almost surely, 2^21343555466 is an apocalyptic number.

21343555466 is a deficient number, since it is larger than the sum of its proper divisors (10671777736).

21343555466 is a wasteful number, since it uses less digits than its factorization.

21343555466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10671777735.

The product of its digits is 1296000, while the sum is 44.

The spelling of 21343555466 in words is "twenty-one billion, three hundred forty-three million, five hundred fifty-five thousand, four hundred sixty-six".