20474479 has 2 divisors, whose sum is σ = 20474480. Its totient is φ = 20474478.

The previous prime is 20474473. The next prime is 20474491. The reversal of 20474479 is 97447402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20474479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20474473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10237239 + 10237240.

It is an arithmetic number, because the mean of its divisors is an integer number (10237240).

Almost surely, 2^20474479 is an apocalyptic number.

20474479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20474479 is an equidigital number, since it uses as much as digits as its factorization.

20474479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20474479 is about 4524.8733683939. The cubic root of 20474479 is about 273.5715639014.

The spelling of 20474479 in words is "twenty million, four hundred seventy-four thousand, four hundred seventy-nine".