20713474 has 4 divisors (see below), whose sum is σ = 31070214. Its totient is φ = 10356736.

The previous prime is 20713457. The next prime is 20713489. The reversal of 20713474 is 47431702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14175225 + 6538249 = 3765^2 + 2557^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5178367 + ... + 5178370.

Almost surely, 2^20713474 is an apocalyptic number.

20713474 is a deficient number, since it is larger than the sum of its proper divisors (10356740).

20713474 is a wasteful number, since it uses less digits than its factorization.

20713474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10356739.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20713474 is about 4551.2057742976. The cubic root of 20713474 is about 274.6318997872.

The spelling of 20713474 in words is "twenty million, seven hundred thirteen thousand, four hundred seventy-four".