21825628446 has 64 divisors (see below), whose sum is σ = 44403240960. Its totient is φ = 7151429760.

The previous prime is 21825628439. The next prime is 21825628459. The reversal of 21825628446 is 64482652812.

It is a junction number, because it is equal to n+sod(n) for n = 21825628395 and 21825628404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56106820 + ... + 56107208.

It is an arithmetic number, because the mean of its divisors is an integer number (693800640).

Almost surely, 2^21825628446 is an apocalyptic number.

21825628446 is an abundant number, since it is smaller than the sum of its proper divisors (22577612514).

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

21825628446 is a wasteful number, since it uses less digits than its factorization.

21825628446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its digits is 1474560, while the sum is 48.

The spelling of 21825628446 in words is "twenty-one billion, eight hundred twenty-five million, six hundred twenty-eight thousand, four hundred forty-six".