21428258941 has 16 divisors (see below), whose sum is σ = 21971593728. Its totient is φ = 20888784000.

The previous prime is 21428258939. The next prime is 21428258989. The reversal of 21428258941 is 14985282412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21428258941 - 2¹ = 21428258939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21428258891 and 21428258900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21428255941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20987011 + ... + 20988031.

It is an arithmetic number, because the mean of its divisors is an integer number (1373224608).

Almost surely, 2^21428258941 is an apocalyptic number.

It is an amenable number.

21428258941 is a deficient number, since it is larger than the sum of its proper divisors (543334787).

21428258941 is a wasteful number, since it uses less digits than its factorization.

21428258941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its digits is 368640, while the sum is 46.

The spelling of 21428258941 in words is "twenty-one billion, four hundred twenty-eight million, two hundred fifty-eight thousand, nine hundred forty-one".