20572071 has 8 divisors (see below), whose sum is σ = 29539440. Its totient is φ = 12659712.

The previous prime is 20572043. The next prime is 20572073. The reversal of 20572071 is 17027502.

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

It is not a de Polignac number, because 20572071 - 2⁵ = 20572039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263706 + ... + 263783.

It is an arithmetic number, because the mean of its divisors is an integer number (3692430).

Almost surely, 2^20572071 is an apocalyptic number.

20572071 is a deficient number, since it is larger than the sum of its proper divisors (8967369).

20572071 is a wasteful number, since it uses less digits than its factorization.

20572071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527505.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 20572071 is about 4535.6444966509. The cubic root of 20572071 is about 274.0055364999.

Adding to 20572071 its reverse (17027502), we get a palindrome (37599573).

The spelling of 20572071 in words is "twenty million, five hundred seventy-two thousand, seventy-one".