21428016082 has 24 divisors (see below), whose sum is σ = 35470519056. Its totient is φ = 9701175000.

The previous prime is 21428016059. The next prime is 21428016107. The reversal of 21428016082 is 28061082412.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115644 + ... + 237127.

It is an arithmetic number, because the mean of its divisors is an integer number (1477938294).

Almost surely, 2^21428016082 is an apocalyptic number.

21428016082 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21428016082 is a deficient number, since it is larger than the sum of its proper divisors (14042502974).

21428016082 is a wasteful number, since it uses less digits than its factorization.

21428016082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353046 (or 353035 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

Adding to 21428016082 its reverse (28061082412), we get a palindrome (49489098494).

The spelling of 21428016082 in words is "twenty-one billion, four hundred twenty-eight million, sixteen thousand, eighty-two".