20470972 has 12 divisors (see below), whose sum is σ = 36698256. Its totient is φ = 9985760.

The previous prime is 20470969. The next prime is 20470973. The reversal of 20470972 is 27907402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20470973) 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 3 ways as a sum of consecutive naturals, for example, 62248 + ... + 62575.

It is an arithmetic number, because the mean of its divisors is an integer number (3058188).

Almost surely, 2^20470972 is an apocalyptic number.

It is an amenable number.

20470972 is a deficient number, since it is larger than the sum of its proper divisors (16227284).

20470972 is a wasteful number, since it uses less digits than its factorization.

20470972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124868 (or 124866 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20470972 is about 4524.4858271410. The cubic root of 20470972 is about 273.5559433125. Note that the first 3 decimals are identical.

The spelling of 20470972 in words is "twenty million, four hundred seventy thousand, nine hundred seventy-two".