20415542606 has 4 divisors (see below), whose sum is σ = 30623313912. Its totient is φ = 10207771302.

The previous prime is 20415542599. The next prime is 20415542611. The reversal of 20415542606 is 60624551402.

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

It is a Curzon number.

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, 5103885650 + ... + 5103885653.

It is an arithmetic number, because the mean of its divisors is an integer number (7655828478).

Almost surely, 2^20415542606 is an apocalyptic number.

20415542606 is a deficient number, since it is larger than the sum of its proper divisors (10207771306).

20415542606 is a wasteful number, since it uses less digits than its factorization.

20415542606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10207771305.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 20415542606 in words is "twenty billion, four hundred fifteen million, five hundred forty-two thousand, six hundred six".