20703958977 has 16 divisors (see below), whose sum is σ = 29904680960. Its totient is φ = 12740893776.

The previous prime is 20703958927. The next prime is 20703958991. The reversal of 20703958977 is 77985930702.

It is not a de Polignac number, because 20703958977 - 2¹¹ = 20703956929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20703958927) 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, 1564033 + ... + 1577214.

It is an arithmetic number, because the mean of its divisors is an integer number (1869042560).

Almost surely, 2^20703958977 is an apocalyptic number.

It is an amenable number.

20703958977 is a deficient number, since it is larger than the sum of its proper divisors (9200721983).

20703958977 is an equidigital number, since it uses as much as digits as its factorization.

20703958977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141289 (or 3141263 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 57.

The spelling of 20703958977 in words is "twenty billion, seven hundred three million, nine hundred fifty-eight thousand, nine hundred seventy-seven".