20662347 has 8 divisors (see below), whose sum is σ = 28001680. Its totient is φ = 13548960.

The previous prime is 20662333. The next prime is 20662351. The reversal of 20662347 is 74326602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20662347 - 2⁶ = 20662283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20662307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56272 + ... + 56637.

It is an arithmetic number, because the mean of its divisors is an integer number (3500210).

Almost surely, 2^20662347 is an apocalyptic number.

20662347 is a deficient number, since it is larger than the sum of its proper divisors (7339333).

20662347 is a wasteful number, since it uses less digits than its factorization.

20662347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112973.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 20662347 is about 4545.5854408426. The cubic root of 20662347 is about 274.4057559489.

Adding to 20662347 its reverse (74326602), we get a palindrome (94988949).

The spelling of 20662347 in words is "twenty million, six hundred sixty-two thousand, three hundred forty-seven".