20389958 has 8 divisors (see below), whose sum is σ = 31639680. Its totient is φ = 9843400.

The previous prime is 20389951. The next prime is 20389991. The reversal of 20389958 is 85998302.

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 (20389951) 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, 175718 + ... + 175833.

It is an arithmetic number, because the mean of its divisors is an integer number (3954960).

Almost surely, 2^20389958 is an apocalyptic number.

20389958 is a deficient number, since it is larger than the sum of its proper divisors (11249722).

20389958 is a wasteful number, since it uses less digits than its factorization.

20389958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351582.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 20389958 is about 4515.5241113297. The cubic root of 20389958 is about 273.1945997659.

The spelling of 20389958 in words is "twenty million, three hundred eighty-nine thousand, nine hundred fifty-eight".