21452825412 has 54 divisors (see below), whose sum is σ = 54771139514. Its totient is φ = 7080019200.

The previous prime is 21452825411. The next prime is 21452825413.

21452825412 is a `hidden beast` number, since 214 + 5 + 2 + 8 + 25 + 412 = 666.

21452825412 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21452825411) and next prime (21452825413).

It can be written as a sum of positive squares in 3 ways, for example, as 18946421316 + 2506404096 = 137646^2 + 50064^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21452825411) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 338028 + ... + 396444.

Almost surely, 2^21452825412 is an apocalyptic number.

It is an amenable number.

21452825412 is an abundant number, since it is smaller than the sum of its proper divisors (33318314102).

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

21452825412 is a wasteful number, since it uses less digits than its factorization.

21452825412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58629 (or 58523 counting only the distinct ones).

The product of its digits is 51200, while the sum is 36.

The spelling of 21452825412 in words is "twenty-one billion, four hundred fifty-two million, eight hundred twenty-five thousand, four hundred twelve".