21343307745 has 16 divisors (see below), whose sum is σ = 34151382720. Its totient is φ = 11382400704.

The previous prime is 21343307737. The next prime is 21343307771. The reversal of 21343307745 is 54770334312.

It is not a de Polignac number, because 21343307745 - 2³ = 21343307737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294151 + ... + 359459.

It is an arithmetic number, because the mean of its divisors is an integer number (2134461420).

Almost surely, 2^21343307745 is an apocalyptic number.

It is an amenable number.

21343307745 is a deficient number, since it is larger than the sum of its proper divisors (12808074975).

21343307745 is a wasteful number, since it uses less digits than its factorization.

21343307745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87104.

The product of its (nonzero) digits is 211680, while the sum is 39.

The spelling of 21343307745 in words is "twenty-one billion, three hundred forty-three million, three hundred seven thousand, seven hundred forty-five".