20735387377 has 4 divisors (see below), whose sum is σ = 20822146560. Its totient is φ = 20648628196.

The previous prime is 20735387371. The next prime is 20735387389. The reversal of 20735387377 is 77378353702.

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 20735387377 - 2¹⁹ = 20734863089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20735387371) 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, 43379233 + ... + 43379710.

It is an arithmetic number, because the mean of its divisors is an integer number (5205536640).

Almost surely, 2^20735387377 is an apocalyptic number.

It is an amenable number.

20735387377 is a deficient number, since it is larger than the sum of its proper divisors (86759183).

20735387377 is an equidigital number, since it uses as much as digits as its factorization.

20735387377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86759182.

The product of its (nonzero) digits is 5186160, while the sum is 52.

The spelling of 20735387377 in words is "twenty billion, seven hundred thirty-five million, three hundred eighty-seven thousand, three hundred seventy-seven".