21235151408 has 40 divisors (see below), whose sum is σ = 41420871216. Its totient is φ = 10546099200.

The previous prime is 21235151383. The next prime is 21235151411. The reversal of 21235151408 is 80415153212.

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 7 ways as a sum of consecutive naturals, for example, 1752860 + ... + 1764932.

Almost surely, 2^21235151408 is an apocalyptic number.

It is an amenable number.

21235151408 is a deficient number, since it is larger than the sum of its proper divisors (20185719808).

21235151408 is a wasteful number, since it uses less digits than its factorization.

21235151408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12813 (or 12807 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 21235151408 in words is "twenty-one billion, two hundred thirty-five million, one hundred fifty-one thousand, four hundred eight".