20070045 has 16 divisors (see below), whose sum is σ = 35680320. Its totient is φ = 10703952.

The previous prime is 20070031. The next prime is 20070049. The reversal of 20070045 is 54007002.

It is a happy number.

It is not a de Polignac number, because 20070045 - 2¹¹ = 20067997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20070049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74199 + ... + 74468.

It is an arithmetic number, because the mean of its divisors is an integer number (2230020).

Almost surely, 2^20070045 is an apocalyptic number.

It is an amenable number.

20070045 is a deficient number, since it is larger than the sum of its proper divisors (15610275).

20070045 is a wasteful number, since it uses less digits than its factorization.

20070045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148681 (or 148675 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20070045 is about 4479.9603792891. The cubic root of 20070045 is about 271.7582780766.

Adding to 20070045 its reverse (54007002), we get a palindrome (74077047).

The spelling of 20070045 in words is "twenty million, seventy thousand, forty-five".