20671498 has 4 divisors (see below), whose sum is σ = 31007250. Its totient is φ = 10335748.

The previous prime is 20671477. The next prime is 20671499. The reversal of 20671498 is 89417602.

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., 19954089 + 717409 = 4467^2 + 847^2 .

It is not an unprimeable number, because it can be changed into a prime (20671499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5167873 + ... + 5167876.

Almost surely, 2^20671498 is an apocalyptic number.

20671498 is a deficient number, since it is larger than the sum of its proper divisors (10335752).

20671498 is a wasteful number, since it uses less digits than its factorization.

20671498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10335751.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20671498 is about 4546.5919104314. The cubic root of 20671498 is about 274.4462598416.

The spelling of 20671498 in words is "twenty million, six hundred seventy-one thousand, four hundred ninety-eight".