21153415546 has 8 divisors (see below), whose sum is σ = 31745246400. Its totient is φ = 10571666748.

The previous prime is 21153415511. The next prime is 21153415589. The reversal of 21153415546 is 64551435112.

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

It is a super-3 number, since 3×21153415546³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2515266 + ... + 2523661.

It is an arithmetic number, because the mean of its divisors is an integer number (3968155800).

Almost surely, 2^21153415546 is an apocalyptic number.

21153415546 is a deficient number, since it is larger than the sum of its proper divisors (10591830854).

21153415546 is a wasteful number, since it uses less digits than its factorization.

21153415546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041028.

The product of its digits is 72000, while the sum is 37.

The spelling of 21153415546 in words is "twenty-one billion, one hundred fifty-three million, four hundred fifteen thousand, five hundred forty-six".