21214026156 has 24 divisors (see below), whose sum is σ = 49613723824. Its totient is φ = 7055009280.

The previous prime is 21214026151. The next prime is 21214026209. The reversal of 21214026156 is 65162041212.

It is a super-3 number, since 3×21214026156³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21214026151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2036185 + ... + 2046576.

Almost surely, 2^21214026156 is an apocalyptic number.

It is an amenable number.

21214026156 is an abundant number, since it is smaller than the sum of its proper divisors (28399697668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214026156 is a wasteful number, since it uses less digits than its factorization.

21214026156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083201 (or 4083199 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21214026156 its reverse (65162041212), we get a palindrome (86376067368).

The spelling of 21214026156 in words is "twenty-one billion, two hundred fourteen million, twenty-six thousand, one hundred fifty-six".