20229658 has 4 divisors (see below), whose sum is σ = 30344490. Its totient is φ = 10114828.

The previous prime is 20229653. The next prime is 20229667. The reversal of 20229658 is 85692202.

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., 16297369 + 3932289 = 4037^2 + 1983^2 .

It is not an unprimeable number, because it can be changed into a prime (20229653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057413 + ... + 5057416.

Almost surely, 2^20229658 is an apocalyptic number.

20229658 is a deficient number, since it is larger than the sum of its proper divisors (10114832).

20229658 is a wasteful number, since it uses less digits than its factorization.

20229658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10114831.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 20229658 is about 4497.7392098698. The cubic root of 20229658 is about 272.4767895389.

The spelling of 20229658 in words is "twenty million, two hundred twenty-nine thousand, six hundred fifty-eight".