20980621958 has 16 divisors (see below), whose sum is σ = 32016623760. Its totient is φ = 10308550656.

The previous prime is 20980621957. The next prime is 20980622009. The reversal of 20980621958 is 85912608902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20980621951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287366 + ... + 352902.

It is an arithmetic number, because the mean of its divisors is an integer number (2001038985).

Almost surely, 2^20980621958 is an apocalyptic number.

20980621958 is a deficient number, since it is larger than the sum of its proper divisors (11036001802).

20980621958 is a wasteful number, since it uses less digits than its factorization.

20980621958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68311.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 20980621958 in words is "twenty billion, nine hundred eighty million, six hundred twenty-one thousand, nine hundred fifty-eight".