20738907 has 72 divisors (see below), whose sum is σ = 37844352. Its totient is φ = 10886400.

The previous prime is 20738903. The next prime is 20738917. The reversal of 20738907 is 70983702.

It is not a de Polignac number, because 20738907 - 2² = 20738903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20738903) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 505807 + ... + 505847.

It is an arithmetic number, because the mean of its divisors is an integer number (525616).

Almost surely, 2^20738907 is an apocalyptic number.

20738907 is a deficient number, since it is larger than the sum of its proper divisors (17105445).

20738907 is a wasteful number, since it uses less digits than its factorization.

20738907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20738907 is about 4553.9990118576. Note that the first 3 decimals coincide. The cubic root of 20738907 is about 274.7442559011.

The spelling of 20738907 in words is "twenty million, seven hundred thirty-eight thousand, nine hundred seven".