20479331 has 2 divisors, whose sum is σ = 20479332. Its totient is φ = 20479330.

The previous prime is 20479297. The next prime is 20479343. The reversal of 20479331 is 13397402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20479331 is a prime.

It is a super-2 number, since 2×20479331² = 838805996415122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20479294 and 20479303.

It is not a weakly prime, because it can be changed into another prime (20479031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10239665 + 10239666.

It is an arithmetic number, because the mean of its divisors is an integer number (10239666).

Almost surely, 2^20479331 is an apocalyptic number.

20479331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20479331 is an equidigital number, since it uses as much as digits as its factorization.

20479331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20479331 is about 4525.4094842345. The cubic root of 20479331 is about 273.5931723371.

The spelling of 20479331 in words is "twenty million, four hundred seventy-nine thousand, three hundred thirty-one".