20346705 has 24 divisors (see below), whose sum is σ = 37343592. Its totient is φ = 10212864.

The previous prime is 20346679. The next prime is 20346713. The reversal of 20346705 is 50764302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8485569 + 11861136 = 2913^2 + 3444^2 .

It is not a de Polignac number, because 20346705 - 2⁵ = 20346673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12534 + ... + 14063.

It is an arithmetic number, because the mean of its divisors is an integer number (1555983).

Almost surely, 2^20346705 is an apocalyptic number.

It is an amenable number.

20346705 is a deficient number, since it is larger than the sum of its proper divisors (16996887).

20346705 is a wasteful number, since it uses less digits than its factorization.

20346705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26625 (or 26622 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20346705 is about 4510.7322022040. The cubic root of 20346705 is about 273.0012880831.

The spelling of 20346705 in words is "twenty million, three hundred forty-six thousand, seven hundred five".