21343307746 has 16 divisors (see below), whose sum is σ = 33606969984. Its totient is φ = 10146541504.

The previous prime is 21343307737. The next prime is 21343307771. The reversal of 21343307746 is 64770334312.

It is a junction number, because it is equal to n+sod(n) for n = 21343307699 and 21343307708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381495 + ... + 1396858.

It is an arithmetic number, because the mean of its divisors is an integer number (2100435624).

Almost surely, 2^21343307746 is an apocalyptic number.

21343307746 is a deficient number, since it is larger than the sum of its proper divisors (12263662238).

21343307746 is a wasteful number, since it uses less digits than its factorization.

21343307746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778545.

The product of its (nonzero) digits is 254016, while the sum is 40.

The spelling of 21343307746 in words is "twenty-one billion, three hundred forty-three million, three hundred seven thousand, seven hundred forty-six".