20247672 has 32 divisors (see below), whose sum is σ = 51126480. Its totient is φ = 6681600.

The previous prime is 20247671. The next prime is 20247691. The reversal of 20247672 is 27674202.

It is a super-3 number, since 3×20247672³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753 + ... + 6600.

Almost surely, 2^20247672 is an apocalyptic number.

It is an amenable number.

20247672 is an abundant number, since it is smaller than the sum of its proper divisors (30878808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20247672 is a wasteful number, since it uses less digits than its factorization.

20247672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8463 (or 8459 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20247672 is about 4499.7413258986. The cubic root of 20247672 is about 272.5576434462.

It can be divided in two parts, 202 and 47672, that added together give a palindrome (47874).

The spelling of 20247672 in words is "twenty million, two hundred forty-seven thousand, six hundred seventy-two".