21485091229 has 8 divisors (see below), whose sum is σ = 25346467328. Its totient is φ = 17821734480.

The previous prime is 21485091227. The next prime is 21485091307. The reversal of 21485091229 is 92219058412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21485091229 - 2¹ = 21485091227 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485091227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49504602 + ... + 49505035.

It is an arithmetic number, because the mean of its divisors is an integer number (3168308416).

Almost surely, 2^21485091229 is an apocalyptic number.

It is an amenable number.

21485091229 is a deficient number, since it is larger than the sum of its proper divisors (3861376099).

21485091229 is an equidigital number, since it uses as much as digits as its factorization.

21485091229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99009675.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 21485091229 in words is "twenty-one billion, four hundred eighty-five million, ninety-one thousand, two hundred twenty-nine".