20472344 has 8 divisors (see below), whose sum is σ = 38385660. Its totient is φ = 10236168.

The previous prime is 20472341. The next prime is 20472349. The reversal of 20472344 is 44327402.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279514 + ... + 1279529.

Almost surely, 2^20472344 is an apocalyptic number.

It is an amenable number.

20472344 is a deficient number, since it is larger than the sum of its proper divisors (17913316).

20472344 is a wasteful number, since it uses less digits than its factorization.

20472344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559049 (or 2559045 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 20472344 is about 4524.6374440390. The cubic root of 20472344 is about 273.5620545737.

Adding to 20472344 its reverse (44327402), we get a palindrome (64799746).

The spelling of 20472344 in words is "twenty million, four hundred seventy-two thousand, three hundred forty-four".