20479343 has 2 divisors, whose sum is σ = 20479344. Its totient is φ = 20479342.

The previous prime is 20479331. The next prime is 20479363. The reversal of 20479343 is 34397402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20479343 - 2⁶ = 20479279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20479363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10239671 + 10239672.

It is an arithmetic number, because the mean of its divisors is an integer number (10239672).

Almost surely, 2^20479343 is an apocalyptic number.

20479343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20479343 is an equidigital number, since it uses as much as digits as its factorization.

20479343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 20479343 is about 4525.4108100812. The cubic root of 20479343 is about 273.5932257750.

The spelling of 20479343 in words is "twenty million, four hundred seventy-nine thousand, three hundred forty-three".