20572154 has 8 divisors (see below), whose sum is σ = 30947700. Its totient is φ = 10256256.

The previous prime is 20572151. The next prime is 20572163. The reversal of 20572154 is 45127502.

It can be written as a sum of positive squares in 2 ways, for example, as 20566225 + 5929 = 4535^2 + 77^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20572151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14039 + ... + 15434.

Almost surely, 2^20572154 is an apocalyptic number.

20572154 is a deficient number, since it is larger than the sum of its proper divisors (10375546).

20572154 is a wasteful number, since it uses less digits than its factorization.

20572154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29824.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 20572154 is about 4535.6536463888. The cubic root of 20572154 is about 274.0059050000.

Adding to 20572154 its reverse (45127502), we get a palindrome (65699656).

The spelling of 20572154 in words is "twenty million, five hundred seventy-two thousand, one hundred fifty-four".