20214745 has 8 divisors (see below), whose sum is σ = 24285960. Its totient is φ = 16152960.

The previous prime is 20214743. The next prime is 20214749. The reversal of 20214745 is 54741202.

It can be written as a sum of positive squares in 4 ways, for example, as 1784896 + 18429849 = 1336^2 + 4293^2 .

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

It is not a de Polignac number, because 20214745 - 2¹ = 20214743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20214743) 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, 3855 + ... + 7435.

It is an arithmetic number, because the mean of its divisors is an integer number (3035745).

Almost surely, 2^20214745 is an apocalyptic number.

It is an amenable number.

20214745 is a deficient number, since it is larger than the sum of its proper divisors (4071215).

20214745 is a wasteful number, since it uses less digits than its factorization.

20214745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20214745 is about 4496.0810713331. The cubic root of 20214745 is about 272.4098178140.

Adding to 20214745 its reverse (54741202), we get a palindrome (74955947).

The spelling of 20214745 in words is "twenty million, two hundred fourteen thousand, seven hundred forty-five".