20401463 has 2 divisors, whose sum is σ = 20401464. Its totient is φ = 20401462.

The previous prime is 20401457. The next prime is 20401481. The reversal of 20401463 is 36410402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20401463 - 2¹⁰ = 20400439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200731 + 10200732.

It is an arithmetic number, because the mean of its divisors is an integer number (10200732).

Almost surely, 2^20401463 is an apocalyptic number.

20401463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401463 is an equidigital number, since it uses as much as digits as its factorization.

20401463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20401463 is about 4516.7978701731. The cubic root of 20401463 is about 273.2459733047.

Adding to 20401463 its reverse (36410402), we get a palindrome (56811865).

The spelling of 20401463 in words is "twenty million, four hundred one thousand, four hundred sixty-three".