20609958 has 16 divisors (see below), whose sum is σ = 41264496. Its totient is φ = 6862560.

The previous prime is 20609929. The next prime is 20609977. The reversal of 20609958 is 85990602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9460 + ... + 11432.

It is an arithmetic number, because the mean of its divisors is an integer number (2579031).

Almost surely, 2^20609958 is an apocalyptic number.

20609958 is an abundant number, since it is smaller than the sum of its proper divisors (20654538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20609958 is a wasteful number, since it uses less digits than its factorization.

20609958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 20609958 is about 4539.8191593939. The cubic root of 20609958 is about 274.1736427530.

The spelling of 20609958 in words is "twenty million, six hundred nine thousand, nine hundred fifty-eight".