20613613546 has 8 divisors (see below), whose sum is σ = 30928407300. Its totient is φ = 10304144448.

The previous prime is 20613613529. The next prime is 20613613577. The reversal of 20613613546 is 64531631602.

It can be written as a sum of positive squares in 2 ways, for example, as 17254136025 + 3359477521 = 131355^2 + 57961^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321471 + ... + 1336978.

Almost surely, 2^20613613546 is an apocalyptic number.

20613613546 is a deficient number, since it is larger than the sum of its proper divisors (10314793754).

20613613546 is a wasteful number, since it uses less digits than its factorization.

20613613546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662328.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 20613613546 in words is "twenty billion, six hundred thirteen million, six hundred thirteen thousand, five hundred forty-six".