20145320506077 has 16 divisors (see below), whose sum is σ = 29025339721728. Its totient is φ = 12354809313600.

The previous prime is 20145320506061. The next prime is 20145320506099. The reversal of 20145320506077 is 77060502354102.

It is not a de Polignac number, because 20145320506077 - 2⁴ = 20145320506061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145320506007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 881467549 + ... + 881490402.

It is an arithmetic number, because the mean of its divisors is an integer number (1814083732608).

Almost surely, 2^{20145320506077} is an apocalyptic number.

It is an amenable number.

20145320506077 is a deficient number, since it is larger than the sum of its proper divisors (8880019215651).

20145320506077 is a wasteful number, since it uses less digits than its factorization.

20145320506077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762958260.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 20145320506077 in words is "twenty trillion, one hundred forty-five billion, three hundred twenty million, five hundred six thousand, seventy-seven".