20323547 has 2 divisors, whose sum is σ = 20323548. Its totient is φ = 20323546.

The previous prime is 20323531. The next prime is 20323561. The reversal of 20323547 is 74532302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20323547 - 2⁴ = 20323531 is a prime.

It is a super-2 number, since 2×20323547² = 826093125322418, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20323447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161773 + 10161774.

It is an arithmetic number, because the mean of its divisors is an integer number (10161774).

Almost surely, 2^20323547 is an apocalyptic number.

20323547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323547 is an equidigital number, since it uses as much as digits as its factorization.

20323547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 20323547 is about 4508.1644823586. The cubic root of 20323547 is about 272.8976748460.

Adding to 20323547 its reverse (74532302), we get a palindrome (94855849).

The spelling of 20323547 in words is "twenty million, three hundred twenty-three thousand, five hundred forty-seven".