20377060561 has 8 divisors (see below), whose sum is σ = 23939483904. Its totient is φ = 17099631120.

The previous prime is 20377060541. The next prime is 20377060567. The reversal of 20377060561 is 16506077302.

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

It is not a de Polignac number, because 20377060561 - 2⁹ = 20377060049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20377060561.

It is not an unprimeable number, because it can be changed into a prime (20377060567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71248321 + ... + 71248606.

It is an arithmetic number, because the mean of its divisors is an integer number (2992435488).

Almost surely, 2^20377060561 is an apocalyptic number.

It is an amenable number.

20377060561 is a deficient number, since it is larger than the sum of its proper divisors (3562423343).

20377060561 is a wasteful number, since it uses less digits than its factorization.

20377060561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142496951.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 20377060561 in words is "twenty billion, three hundred seventy-seven million, sixty thousand, five hundred sixty-one".