21032181463 has 2 divisors, whose sum is σ = 21032181464. Its totient is φ = 21032181462.

The previous prime is 21032181451. The next prime is 21032181493. The reversal of 21032181463 is 36418123012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21032181463 - 2³³ = 12442246871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032181493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516090731 + 10516090732.

It is an arithmetic number, because the mean of its divisors is an integer number (10516090732).

Almost surely, 2^21032181463 is an apocalyptic number.

21032181463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032181463 is an equidigital number, since it uses as much as digits as its factorization.

21032181463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21032181463 in words is "twenty-one billion, thirty-two million, one hundred eighty-one thousand, four hundred sixty-three".