20540732606 has 4 divisors (see below), whose sum is σ = 30811098912. Its totient is φ = 10270366302.

The previous prime is 20540732593. The next prime is 20540732623. The reversal of 20540732606 is 60623704502.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5135183150 + ... + 5135183153.

It is an arithmetic number, because the mean of its divisors is an integer number (7702774728).

Almost surely, 2^20540732606 is an apocalyptic number.

20540732606 is a deficient number, since it is larger than the sum of its proper divisors (10270366306).

20540732606 is a wasteful number, since it uses less digits than its factorization.

20540732606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10270366305.

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 20540732606 in words is "twenty billion, five hundred forty million, seven hundred thirty-two thousand, six hundred six".