21829056427 has 2 divisors, whose sum is σ = 21829056428. Its totient is φ = 21829056426.

The previous prime is 21829056409. The next prime is 21829056541. The reversal of 21829056427 is 72465092812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21829056427 - 2⁷ = 21829056299 is a prime.

It is not a weakly prime, because it can be changed into another prime (21829056827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10914528213 + 10914528214.

It is an arithmetic number, because the mean of its divisors is an integer number (10914528214).

Almost surely, 2^21829056427 is an apocalyptic number.

21829056427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21829056427 is an equidigital number, since it uses as much as digits as its factorization.

21829056427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 21829056427 in words is "twenty-one billion, eight hundred twenty-nine million, fifty-six thousand, four hundred twenty-seven".