20031472 has 40 divisors (see below), whose sum is σ = 41247360. Its totient is φ = 9397440.

The previous prime is 20031463. The next prime is 20031481. The reversal of 20031472 is 27413002.

It is an interprime number because it is at equal distance from previous prime (20031463) and next prime (20031481).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

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, 39573 + ... + 40075.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^20031472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20623680).

20031472 is an abundant number, since it is smaller than the sum of its proper divisors (21215888).

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

20031472 is a wasteful number, since it uses less digits than its factorization.

20031472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20031472 is about 4475.6532484097. The cubic root of 20031472 is about 271.5840672936.

Adding to 20031472 its reverse (27413002), we get a palindrome (47444474).

It can be divided in two parts, 20031 and 472, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20031472 in words is "twenty million, thirty-one thousand, four hundred seventy-two".