21825245562 has 16 divisors (see below), whose sum is σ = 43655589792. Its totient is φ = 7274232080.

The previous prime is 21825245543. The next prime is 21825245621. The reversal of 21825245562 is 26554252812.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155628 + ... + 260519.

It is an arithmetic number, because the mean of its divisors is an integer number (2728474362).

Almost surely, 2^21825245562 is an apocalyptic number.

21825245562 is an abundant number, since it is smaller than the sum of its proper divisors (21830344230).

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

21825245562 is a wasteful number, since it uses less digits than its factorization.

21825245562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424893.

The product of its digits is 384000, while the sum is 42.

The spelling of 21825245562 in words is "twenty-one billion, eight hundred twenty-five million, two hundred forty-five thousand, five hundred sixty-two".