21355543046 has 8 divisors (see below), whose sum is σ = 32094800424. Its totient is φ = 10657276240.

The previous prime is 21355542961. The next prime is 21355543057. The reversal of 21355543046 is 64034555312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10246340 + ... + 10248423.

It is an arithmetic number, because the mean of its divisors is an integer number (4011850053).

Almost surely, 2^21355543046 is an apocalyptic number.

21355543046 is a deficient number, since it is larger than the sum of its proper divisors (10739257378).

21355543046 is a wasteful number, since it uses less digits than its factorization.

21355543046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20495286.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 21355543046 in words is "twenty-one billion, three hundred fifty-five million, five hundred forty-three thousand, forty-six".