21651534146 has 8 divisors (see below), whose sum is σ = 35429783184. Its totient is φ = 9841606420.

The previous prime is 21651534103. The next prime is 21651534199. The reversal of 21651534146 is 64143515612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 492080300 + ... + 492080343.

It is an arithmetic number, because the mean of its divisors is an integer number (4428722898).

Almost surely, 2^21651534146 is an apocalyptic number.

21651534146 is a deficient number, since it is larger than the sum of its proper divisors (13778249038).

21651534146 is a wasteful number, since it uses less digits than its factorization.

21651534146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984160656.

The product of its digits is 86400, while the sum is 38.

The spelling of 21651534146 in words is "twenty-one billion, six hundred fifty-one million, five hundred thirty-four thousand, one hundred forty-six".