21346021156 has 12 divisors (see below), whose sum is σ = 37426966192. Its totient is φ = 10652602248.

The previous prime is 21346021087. The next prime is 21346021187. The reversal of 21346021156 is 65112064312.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5099730 + ... + 5103913.

Almost surely, 2^21346021156 is an apocalyptic number.

It is an amenable number.

21346021156 is a deficient number, since it is larger than the sum of its proper divisors (16080945036).

21346021156 is a wasteful number, since it uses less digits than its factorization.

21346021156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10204170 (or 10204168 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 21346021156 its reverse (65112064312), we get a palindrome (86458085468).

The spelling of 21346021156 in words is "twenty-one billion, three hundred forty-six million, twenty-one thousand, one hundred fifty-six".