20738507 has 2 divisors, whose sum is σ = 20738508. Its totient is φ = 20738506.

The previous prime is 20738489. The next prime is 20738533. The reversal of 20738507 is 70583702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20738507 - 2¹² = 20734411 is a prime.

It is not a weakly prime, because it can be changed into another prime (20738587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369253 + 10369254.

It is an arithmetic number, because the mean of its divisors is an integer number (10369254).

Almost surely, 2^20738507 is an apocalyptic number.

20738507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20738507 is an equidigital number, since it uses as much as digits as its factorization.

20738507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20738507 is about 4553.9550942011. The cubic root of 20738507 is about 274.7424895205.

The spelling of 20738507 in words is "twenty million, seven hundred thirty-eight thousand, five hundred seven".