20572351 has 2 divisors, whose sum is σ = 20572352. Its totient is φ = 20572350.

The previous prime is 20572337. The next prime is 20572367. The reversal of 20572351 is 15327502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20572351 - 2⁵ = 20572319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20572301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286175 + 10286176.

It is an arithmetic number, because the mean of its divisors is an integer number (10286176).

Almost surely, 2^20572351 is an apocalyptic number.

20572351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572351 is an equidigital number, since it uses as much as digits as its factorization.

20572351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20572351 is about 4535.6753631626. The cubic root of 20572351 is about 274.0067796287.

Adding to 20572351 its reverse (15327502), we get a palindrome (35899853).

The spelling of 20572351 in words is "twenty million, five hundred seventy-two thousand, three hundred fifty-one".