20735945 has 8 divisors (see below), whose sum is σ = 24936000. Its totient is φ = 16553520.

The previous prime is 20735927. The next prime is 20735969. The reversal of 20735945 is 54953702.

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

It is not a de Polignac number, because 20735945 - 2¹⁰ = 20734921 is a prime.

It is a zygodrome in base 3.

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, 1661 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (3117000).

Almost surely, 2^20735945 is an apocalyptic number.

It is an amenable number.

20735945 is a deficient number, since it is larger than the sum of its proper divisors (4200055).

20735945 is an equidigital number, since it uses as much as digits as its factorization.

20735945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8815.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 20735945 is about 4553.6737915665. The cubic root of 20735945 is about 274.7311753141.

The spelling of 20735945 in words is "twenty million, seven hundred thirty-five thousand, nine hundred forty-five".