20153723 has 2 divisors, whose sum is σ = 20153724. Its totient is φ = 20153722.

The previous prime is 20153677. The next prime is 20153743. The reversal of 20153723 is 32735102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20153723 - 2⁸ = 20153467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20153743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076861 + 10076862.

It is an arithmetic number, because the mean of its divisors is an integer number (10076862).

Almost surely, 2^20153723 is an apocalyptic number.

20153723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20153723 is an equidigital number, since it uses as much as digits as its factorization.

20153723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20153723 is about 4489.2898102038. The cubic root of 20153723 is about 272.1354348236.

Adding to 20153723 its reverse (32735102), we get a palindrome (52888825).

The spelling of 20153723 in words is "twenty million, one hundred fifty-three thousand, seven hundred twenty-three".