20740546 has 4 divisors (see below), whose sum is σ = 31110822. Its totient is φ = 10370272.

The previous prime is 20740513. The next prime is 20740553. The reversal of 20740546 is 64504702.

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., 20657025 + 83521 = 4545^2 + 289^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5185135 + ... + 5185138.

Almost surely, 2^20740546 is an apocalyptic number.

20740546 is a deficient number, since it is larger than the sum of its proper divisors (10370276).

20740546 is a wasteful number, since it uses less digits than its factorization.

20740546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10370275.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20740546 is about 4554.1789600322. The cubic root of 20740546 is about 274.7514934084.

The spelling of 20740546 in words is "twenty million, seven hundred forty thousand, five hundred forty-six".