20237247 has 6 divisors (see below), whose sum is σ = 29231592. Its totient is φ = 13491492.

The previous prime is 20237237. The next prime is 20237249. The reversal of 20237247 is 74273202.

It is not a de Polignac number, because 20237247 - 2⁶ = 20237183 is a prime.

It is a super-2 number, since 2×20237247² = 819092332278018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20237247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20237249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1124283 + ... + 1124300.

It is an arithmetic number, because the mean of its divisors is an integer number (4871932).

Almost surely, 2^20237247 is an apocalyptic number.

20237247 is a deficient number, since it is larger than the sum of its proper divisors (8994345).

20237247 is a wasteful number, since it uses less digits than its factorization.

20237247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248589 (or 2248586 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20237247 is about 4498.5827768309. The cubic root of 20237247 is about 272.5108578004.

The spelling of 20237247 in words is "twenty million, two hundred thirty-seven thousand, two hundred forty-seven".