21541482628 has 6 divisors (see below), whose sum is σ = 37697594606. Its totient is φ = 10770741312.

The previous prime is 21541482601. The next prime is 21541482631. The reversal of 21541482628 is 82628414512.

It can be written as a sum of positive squares in only one way, i.e., 21540845824 + 636804 = 146768^2 + 798^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2692685325 + ... + 2692685332.

Almost surely, 2^21541482628 is an apocalyptic number.

It is an amenable number.

21541482628 is a deficient number, since it is larger than the sum of its proper divisors (16156111978).

21541482628 is a wasteful number, since it uses less digits than its factorization.

21541482628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385370661 (or 5385370659 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The spelling of 21541482628 in words is "twenty-one billion, five hundred forty-one million, four hundred eighty-two thousand, six hundred twenty-eight".