20365151 has 4 divisors (see below), whose sum is σ = 20861904. Its totient is φ = 19868400.

The previous prime is 20365141. The next prime is 20365157. The reversal of 20365151 is 15156302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20365151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248315 + ... + 248396.

It is an arithmetic number, because the mean of its divisors is an integer number (5215476).

Almost surely, 2^20365151 is an apocalyptic number.

20365151 is a deficient number, since it is larger than the sum of its proper divisors (496753).

20365151 is an equidigital number, since it uses as much as digits as its factorization.

20365151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496752.

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

The square root of 20365151 is about 4512.7764181267. The cubic root of 20365151 is about 273.0837627105.

The spelling of 20365151 in words is "twenty million, three hundred sixty-five thousand, one hundred fifty-one".