20146121 has 4 divisors (see below), whose sum is σ = 20180244. Its totient is φ = 20112000.

The previous prime is 20146111. The next prime is 20146153. The reversal of 20146121 is 12164102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11526025 + 8620096 = 3395^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 20146121 - 2⁶ = 20146057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20146121.

It is not an unprimeable number, because it can be changed into a prime (20146111) 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, 16160 + ... + 17361.

It is an arithmetic number, because the mean of its divisors is an integer number (5045061).

Almost surely, 2^20146121 is an apocalyptic number.

It is an amenable number.

20146121 is a deficient number, since it is larger than the sum of its proper divisors (34123).

20146121 is an equidigital number, since it uses as much as digits as its factorization.

20146121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34122.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 20146121 is about 4488.4430485414. The cubic root of 20146121 is about 272.1012139546.

The spelling of 20146121 in words is "twenty million, one hundred forty-six thousand, one hundred twenty-one".