21314532355 has 4 divisors (see below), whose sum is σ = 25577438832. Its totient is φ = 17051625880.

The previous prime is 21314532347. The next prime is 21314532361. The reversal of 21314532355 is 55323541312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21314532355 - 2³ = 21314532347 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 21314532355.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131453231 + ... + 2131453240.

It is an arithmetic number, because the mean of its divisors is an integer number (6394359708).

Almost surely, 2^21314532355 is an apocalyptic number.

21314532355 is a deficient number, since it is larger than the sum of its proper divisors (4262906477).

21314532355 is an equidigital number, since it uses as much as digits as its factorization.

21314532355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262906476.

The product of its digits is 54000, while the sum is 34.

The spelling of 21314532355 in words is "twenty-one billion, three hundred fourteen million, five hundred thirty-two thousand, three hundred fifty-five".