20177613536377 has 4 divisors (see below), whose sum is σ = 22011942039696. Its totient is φ = 18343285033060.

The previous prime is 20177613536329. The next prime is 20177613536387. The reversal of 20177613536377 is 77363531677102.

It is a happy number.

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 20177613536377 - 2²⁷ = 20177479318649 is a prime.

It is a super-2 number, since 2×20177613536377² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20177613536317) 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, 917164251643 + ... + 917164251664.

It is an arithmetic number, because the mean of its divisors is an integer number (5502985509924).

Almost surely, 2^{20177613536377} is an apocalyptic number.

It is an amenable number.

20177613536377 is a deficient number, since it is larger than the sum of its proper divisors (1834328503319).

20177613536377 is a wasteful number, since it uses less digits than its factorization.

20177613536377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834328503318.

The product of its (nonzero) digits is 23337720, while the sum is 58.

The spelling of 20177613536377 in words is "twenty trillion, one hundred seventy-seven billion, six hundred thirteen million, five hundred thirty-six thousand, three hundred seventy-seven".