21542082002 has 16 divisors (see below), whose sum is σ = 36937921920. Its totient is φ = 9230161248.

The previous prime is 21542081999. The next prime is 21542082007. The reversal of 21542082002 is 20028024512.

It is a super-2 number, since 2×21542082002² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21542082007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117227 + ... + 238382.

It is an arithmetic number, because the mean of its divisors is an integer number (2308620120).

Almost surely, 2^21542082002 is an apocalyptic number.

21542082002 is a deficient number, since it is larger than the sum of its proper divisors (15395839918).

21542082002 is a wasteful number, since it uses less digits than its factorization.

21542082002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359945.

The product of its (nonzero) digits is 2560, while the sum is 26.

The spelling of 21542082002 in words is "twenty-one billion, five hundred forty-two million, eighty-two thousand, two".