20653151 has 2 divisors, whose sum is σ = 20653152. Its totient is φ = 20653150.

The previous prime is 20653117. The next prime is 20653153. The reversal of 20653151 is 15135602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20653151 - 2¹⁴ = 20636767 is a prime.

Together with 20653153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20653153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10326575 + 10326576.

It is an arithmetic number, because the mean of its divisors is an integer number (10326576).

Almost surely, 2^20653151 is an apocalyptic number.

20653151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20653151 is an equidigital number, since it uses as much as digits as its factorization.

20653151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 20653151 is about 4544.5737973984. The cubic root of 20653151 is about 274.3650408293.

Adding to 20653151 its reverse (15135602), we get a palindrome (35788753).

The spelling of 20653151 in words is "twenty million, six hundred fifty-three thousand, one hundred fifty-one".