21574854463 has 2 divisors, whose sum is σ = 21574854464. Its totient is φ = 21574854462.

The previous prime is 21574854449. The next prime is 21574854487. The reversal of 21574854463 is 36445847512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21574854463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21574854263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10787427231 + 10787427232.

It is an arithmetic number, because the mean of its divisors is an integer number (10787427232).

Almost surely, 2^21574854463 is an apocalyptic number.

21574854463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21574854463 is an equidigital number, since it uses as much as digits as its factorization.

21574854463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 49.

The spelling of 21574854463 in words is "twenty-one billion, five hundred seventy-four million, eight hundred fifty-four thousand, four hundred sixty-three".