20155153 has 4 divisors (see below), whose sum is σ = 21031488. Its totient is φ = 19278820.

The previous prime is 20155147. The next prime is 20155159. The reversal of 20155153 is 35155102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35155102 = 2 ⋅17577551.

It is an interprime number because it is at equal distance from previous prime (20155147) and next prime (20155159).

It is a cyclic number.

It is not a de Polignac number, because 20155153 - 2¹³ = 20146961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20155159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438133 + ... + 438178.

It is an arithmetic number, because the mean of its divisors is an integer number (5257872).

Almost surely, 2^20155153 is an apocalyptic number.

20155153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20155153 is a deficient number, since it is larger than the sum of its proper divisors (876335).

20155153 is an equidigital number, since it uses as much as digits as its factorization.

20155153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876334.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 20155153 is about 4489.4490753321. The cubic root of 20155153 is about 272.1418710946.

The spelling of 20155153 in words is "twenty million, one hundred fifty-five thousand, one hundred fifty-three".