20977803274718 has 8 divisors (see below), whose sum is σ = 31545966134712. Its totient is φ = 10462481229816.

The previous prime is 20977803274711. The next prime is 20977803274741. The reversal of 20977803274718 is 81747230877902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20977803274711) 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, 13210202780 + ... + 13210204367.

It is an arithmetic number, because the mean of its divisors is an integer number (3943245766839).

Almost surely, 2^{20977803274718} is an apocalyptic number.

20977803274718 is a deficient number, since it is larger than the sum of its proper divisors (10568162859994).

20977803274718 is a wasteful number, since it uses less digits than its factorization.

20977803274718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26420407546.

The product of its (nonzero) digits is 66382848, while the sum is 65.

The spelling of 20977803274718 in words is "twenty trillion, nine hundred seventy-seven billion, eight hundred three million, two hundred seventy-four thousand, seven hundred eighteen".