20245151 has 2 divisors, whose sum is σ = 20245152. Its totient is φ = 20245150.

The previous prime is 20245123. The next prime is 20245157. The reversal of 20245151 is 15154202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20245151 is a prime.

It is a super-2 number, since 2×20245151² = 819732278025602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20245157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122575 + 10122576.

It is an arithmetic number, because the mean of its divisors is an integer number (10122576).

Almost surely, 2^20245151 is an apocalyptic number.

20245151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20245151 is an equidigital number, since it uses as much as digits as its factorization.

20245151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 20245151 is about 4499.4611899649. The cubic root of 20245151 is about 272.5463310948.

Adding to 20245151 its reverse (15154202), we get a palindrome (35399353).

The spelling of 20245151 in words is "twenty million, two hundred forty-five thousand, one hundred fifty-one".