20923337 has 2 divisors, whose sum is σ = 20923338. Its totient is φ = 20923336.

The previous prime is 20923303. The next prime is 20923349. The reversal of 20923337 is 73332902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13366336 + 7557001 = 3656^2 + 2749^2 .

It is a cyclic number.

It is not a de Polignac number, because 20923337 - 2²² = 16729033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20920337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10461668 + 10461669.

It is an arithmetic number, because the mean of its divisors is an integer number (10461669).

Almost surely, 2^20923337 is an apocalyptic number.

It is an amenable number.

20923337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20923337 is an equidigital number, since it uses as much as digits as its factorization.

20923337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 29.

The square root of 20923337 is about 4574.2034279205. The cubic root of 20923337 is about 275.5562822333.

The spelling of 20923337 in words is "twenty million, nine hundred twenty-three thousand, three hundred thirty-seven".