20572919 has 8 divisors (see below), whose sum is σ = 21351360. Its totient is φ = 19799136.

The previous prime is 20572913. The next prime is 20572931. The reversal of 20572919 is 91927502.

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

It is a cyclic number.

It is not a de Polignac number, because 20572919 - 2⁸ = 20572663 is a prime.

It is a super-2 number, since 2×20572919² = 846489992361122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572913) 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 7 ways as a sum of consecutive naturals, for example, 9677 + ... + 11609.

It is an arithmetic number, because the mean of its divisors is an integer number (2668920).

Almost surely, 2^20572919 is an apocalyptic number.

20572919 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20572919 is a deficient number, since it is larger than the sum of its proper divisors (778441).

20572919 is a wasteful number, since it uses less digits than its factorization.

20572919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 20572919 is about 4535.7379774409. The cubic root of 20572919 is about 274.0093013696.

The spelling of 20572919 in words is "twenty million, five hundred seventy-two thousand, nine hundred nineteen".