20976677670077 has 4 divisors (see below), whose sum is σ = 20976867218976. Its totient is φ = 20976488121180.

The previous prime is 20976677670071. The next prime is 20976677670149. The reversal of 20976677670077 is 77007677667902.

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 20976677670077 - 2¹⁰ = 20976677669053 is a prime.

It is a super-2 number, since 2×20976677670077² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20976677670071) 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, 94608353 + ... + 94829814.

It is an arithmetic number, because the mean of its divisors is an integer number (5244216804744).

Almost surely, 2^{20976677670077} is an apocalyptic number.

It is an amenable number.

20976677670077 is a deficient number, since it is larger than the sum of its proper divisors (189548899).

20976677670077 is a wasteful number, since it uses less digits than its factorization.

20976677670077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189548898.

The product of its (nonzero) digits is 457419312, while the sum is 71.

The spelling of 20976677670077 in words is "twenty trillion, nine hundred seventy-six billion, six hundred seventy-seven million, six hundred seventy thousand, seventy-seven".