20142461 has 4 divisors (see below), whose sum is σ = 20571072. Its totient is φ = 19713852.

The previous prime is 20142427. The next prime is 20142481. The reversal of 20142461 is 16424102.

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.

It is a cyclic number.

It is not a de Polignac number, because 20142461 - 2¹⁴ = 20126077 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 (20142401) 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, 214235 + ... + 214328.

It is an arithmetic number, because the mean of its divisors is an integer number (5142768).

Almost surely, 2^20142461 is an apocalyptic number.

It is an amenable number.

20142461 is a deficient number, since it is larger than the sum of its proper divisors (428611).

20142461 is an equidigital number, since it uses as much as digits as its factorization.

20142461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428610.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20142461 is about 4488.0353162603. The cubic root of 20142461 is about 272.0847351701.

Adding to 20142461 its reverse (16424102), we get a palindrome (36566563).

The spelling of 20142461 in words is "twenty million, one hundred forty-two thousand, four hundred sixty-one".