20448658 has 4 divisors (see below), whose sum is σ = 30672990. Its totient is φ = 10224328.

The previous prime is 20448599. The next prime is 20448661. The reversal of 20448658 is 85684402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20403289 + 45369 = 4517^2 + 213^2 .

It is a super-2 number, since 2×20448658² = 836295228001928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5112163 + ... + 5112166.

Almost surely, 2^20448658 is an apocalyptic number.

20448658 is a deficient number, since it is larger than the sum of its proper divisors (10224332).

20448658 is a wasteful number, since it uses less digits than its factorization.

20448658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224331.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 20448658 is about 4522.0192392337. The cubic root of 20448658 is about 273.4565123303.

The spelling of 20448658 in words is "twenty million, four hundred forty-eight thousand, six hundred fifty-eight".