20193151 has 4 divisors (see below), whose sum is σ = 22028904. Its totient is φ = 18357400.

The previous prime is 20193133. The next prime is 20193167. The reversal of 20193151 is 15139102.

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 20193151 - 2⁵ = 20193119 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 (20193191) 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, 917860 + ... + 917881.

It is an arithmetic number, because the mean of its divisors is an integer number (5507226).

Almost surely, 2^20193151 is an apocalyptic number.

20193151 is a deficient number, since it is larger than the sum of its proper divisors (1835753).

20193151 is a wasteful number, since it uses less digits than its factorization.

20193151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835752.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 20193151 is about 4493.6790050025. The cubic root of 20193151 is about 272.3127844613.

The spelling of 20193151 in words is "twenty million, one hundred ninety-three thousand, one hundred fifty-one".