21485258412 has 48 divisors (see below), whose sum is σ = 51903301632. Its totient is φ = 6910122240.

The previous prime is 21485258407. The next prime is 21485258419.

21485258412 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21485258419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39673 + ... + 211055.

It is an arithmetic number, because the mean of its divisors is an integer number (1081318784).

Almost surely, 2^21485258412 is an apocalyptic number.

It is an amenable number.

21485258412 is an abundant number, since it is smaller than the sum of its proper divisors (30418043220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21485258412 is a wasteful number, since it uses less digits than its factorization.

21485258412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171758 (or 171756 counting only the distinct ones).

The product of its digits is 204800, while the sum is 42.

The spelling of 21485258412 in words is "twenty-one billion, four hundred eighty-five million, two hundred fifty-eight thousand, four hundred twelve".