20727516061 has 4 divisors (see below), whose sum is σ = 23688589792. Its totient is φ = 17766442332.

The previous prime is 20727515993. The next prime is 20727516079. The reversal of 20727516061 is 16061572702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20727516061 - 2⁷ = 20727515933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20727516061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727516091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480536855 + ... + 1480536868.

It is an arithmetic number, because the mean of its divisors is an integer number (5922147448).

Almost surely, 2^20727516061 is an apocalyptic number.

It is an amenable number.

20727516061 is a deficient number, since it is larger than the sum of its proper divisors (2961073731).

20727516061 is an equidigital number, since it uses as much as digits as its factorization.

20727516061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961073730.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 20727516061 in words is "twenty billion, seven hundred twenty-seven million, five hundred sixteen thousand, sixty-one".