20257771624377 has 16 divisors (see below), whose sum is σ = 30878169904512. Its totient is φ = 11572425285120.

The previous prime is 20257771624367. The next prime is 20257771624411. The reversal of 20257771624377 is 77342617775202.

It is not a de Polignac number, because 20257771624377 - 2⁴ = 20257771624361 is a prime.

It is a super-2 number, since 2×20257771624377² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20257771624377.

It is not an unprimeable number, because it can be changed into a prime (20257771624367) 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, 143436678 + ... + 143577839.

It is an arithmetic number, because the mean of its divisors is an integer number (1929885619032).

Almost surely, 2^{20257771624377} is an apocalyptic number.

It is an amenable number.

20257771624377 is a deficient number, since it is larger than the sum of its proper divisors (10620398280135).

20257771624377 is a wasteful number, since it uses less digits than its factorization.

20257771624377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287017888.

The product of its (nonzero) digits is 48404160, while the sum is 60.

The spelling of 20257771624377 in words is "twenty trillion, two hundred fifty-seven billion, seven hundred seventy-one million, six hundred twenty-four thousand, three hundred seventy-seven".