21141882628 has 12 divisors (see below), whose sum is σ = 37124570700. Its totient is φ = 10534862432.

The previous prime is 21141882613. The next prime is 21141882649. The reversal of 21141882628 is 82628814112.

It can be written as a sum of positive squares in 2 ways, for example, as 20592824004 + 549058624 = 143502^2 + 23432^2 .

It is a super-2 number, since 2×21141882628² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9018403 + ... + 9020746.

It is an arithmetic number, because the mean of its divisors is an integer number (3093714225).

Almost surely, 2^21141882628 is an apocalyptic number.

It is an amenable number.

21141882628 is a deficient number, since it is larger than the sum of its proper divisors (15982688072).

21141882628 is a wasteful number, since it uses less digits than its factorization.

21141882628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18039446 (or 18039444 counting only the distinct ones).

The product of its digits is 98304, while the sum is 43.

The spelling of 21141882628 in words is "twenty-one billion, one hundred forty-one million, eight hundred eighty-two thousand, six hundred twenty-eight".