20745002 has 16 divisors (see below), whose sum is σ = 31971912. Its totient is φ = 10091520.

The previous prime is 20744987. The next prime is 20745007. The reversal of 20745002 is 20054702.

It can be written as a sum of positive squares in 4 ways, for example, as 5527201 + 15217801 = 2351^2 + 3901^2 .

It is not an unprimeable number, because it can be changed into a prime (20745007) 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, 10958 + ... + 12710.

Almost surely, 2^20745002 is an apocalyptic number.

20745002 is a deficient number, since it is larger than the sum of its proper divisors (11226910).

20745002 is a wasteful number, since it uses less digits than its factorization.

20745002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20745002 is about 4554.6681547617. The cubic root of 20745002 is about 274.7711683162.

Adding to 20745002 its reverse (20054702), we get a palindrome (40799704).

The spelling of 20745002 in words is "twenty million, seven hundred forty-five thousand, two".