20361151 has 4 divisors (see below), whose sum is σ = 20374704. Its totient is φ = 20347600.

The previous prime is 20361139. The next prime is 20361157. The reversal of 20361151 is 15116302.

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

It is a cyclic number.

It is not a de Polignac number, because 20361151 - 2⁵ = 20361119 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 (20361157) 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, 4195 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (5093676).

Almost surely, 2^20361151 is an apocalyptic number.

20361151 is a deficient number, since it is larger than the sum of its proper divisors (13553).

20361151 is a wasteful number, since it uses less digits than its factorization.

20361151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13552.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20361151 is about 4512.3332102140. Note that the first 3 decimals coincide. The cubic root of 20361151 is about 273.0658823852.

Adding to 20361151 its reverse (15116302), we get a palindrome (35477453).

The spelling of 20361151 in words is "twenty million, three hundred sixty-one thousand, one hundred fifty-one".