20153423 has 2 divisors, whose sum is σ = 20153424. Its totient is φ = 20153422.

The previous prime is 20153401. The next prime is 20153429. The reversal of 20153423 is 32435102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20153423 - 2¹⁸ = 19891279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20153395 and 20153404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20153429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076711 + 10076712.

It is an arithmetic number, because the mean of its divisors is an integer number (10076712).

Almost surely, 2^20153423 is an apocalyptic number.

20153423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20153423 is an equidigital number, since it uses as much as digits as its factorization.

20153423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20153423 is about 4489.2563972222. The cubic root of 20153423 is about 272.1340845183.

Adding to 20153423 its reverse (32435102), we get a palindrome (52588525).

The spelling of 20153423 in words is "twenty million, one hundred fifty-three thousand, four hundred twenty-three".