20450705 has 8 divisors (see below), whose sum is σ = 26771904. Its totient is φ = 14873200.

The previous prime is 20450701. The next prime is 20450719. The reversal of 20450705 is 50705402.

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

It is not a de Polignac number, because 20450705 - 2² = 20450701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20450701) 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, 185861 + ... + 185970.

It is an arithmetic number, because the mean of its divisors is an integer number (3346488).

Almost surely, 2^20450705 is an apocalyptic number.

It is an amenable number.

20450705 is a deficient number, since it is larger than the sum of its proper divisors (6321199).

20450705 is a wasteful number, since it uses less digits than its factorization.

20450705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371847.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20450705 is about 4522.2455705103. The cubic root of 20450705 is about 273.4656367563.

The spelling of 20450705 in words is "twenty million, four hundred fifty thousand, seven hundred five".