20121463 has 4 divisors (see below), whose sum is σ = 20589448. Its totient is φ = 19653480.

The previous prime is 20121433. The next prime is 20121467. The reversal of 20121463 is 36412102.

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 20121463 - 2¹³ = 20113271 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 20121463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121467) 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, 233928 + ... + 234013.

It is an arithmetic number, because the mean of its divisors is an integer number (5147362).

Almost surely, 2^20121463 is an apocalyptic number.

20121463 is a deficient number, since it is larger than the sum of its proper divisors (467985).

20121463 is an equidigital number, since it uses as much as digits as its factorization.

20121463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467984.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20121463 is about 4485.6953753014. The cubic root of 20121463 is about 271.9901551728.

Adding to 20121463 its reverse (36412102), we get a palindrome (56533565).

The spelling of 20121463 in words is "twenty million, one hundred twenty-one thousand, four hundred sixty-three".