20742298 has 4 divisors (see below), whose sum is σ = 31113450. Its totient is φ = 10371148.

The previous prime is 20742247. The next prime is 20742299. The reversal of 20742298 is 89224702.

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., 11175649 + 9566649 = 3343^2 + 3093^2 .

It is not an unprimeable number, because it can be changed into a prime (20742299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5185573 + ... + 5185576.

Almost surely, 2^20742298 is an apocalyptic number.

20742298 is a deficient number, since it is larger than the sum of its proper divisors (10371152).

20742298 is a wasteful number, since it uses less digits than its factorization.

20742298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10371151.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20742298 is about 4554.3713067777. The cubic root of 20742298 is about 274.7592294803.

The spelling of 20742298 in words is "twenty million, seven hundred forty-two thousand, two hundred ninety-eight".