21343505061 has 8 divisors (see below), whose sum is σ = 28470557920. Its totient is φ = 14222727792.

The previous prime is 21343505047. The next prime is 21343505111. The reversal of 21343505061 is 16050534312.

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

It is not a de Polignac number, because 21343505061 - 2⁷ = 21343504933 is a prime.

It is a super-2 number, since 2×21343505061² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343505021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1560955 + ... + 1574568.

It is an arithmetic number, because the mean of its divisors is an integer number (3558819740).

Almost surely, 2^21343505061 is an apocalyptic number.

It is an amenable number.

21343505061 is a deficient number, since it is larger than the sum of its proper divisors (7127052859).

21343505061 is a wasteful number, since it uses less digits than its factorization.

21343505061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137795.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21343505061 in words is "twenty-one billion, three hundred forty-three million, five hundred five thousand, sixty-one".