21546653160 has 64 divisors (see below), whose sum is σ = 66868934400. Its totient is φ = 5547643136.

The previous prime is 21546653147. The next prime is 21546653171. The reversal of 21546653160 is 6135664512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3092304 + ... + 3099263.

It is an arithmetic number, because the mean of its divisors is an integer number (1044827100).

Almost surely, 2^21546653160 is an apocalyptic number.

21546653160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21546653160 is an abundant number, since it is smaller than the sum of its proper divisors (45322281240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21546653160 is a wasteful number, since it uses less digits than its factorization.

21546653160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191610 (or 6191606 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 21546653160 in words is "twenty-one billion, five hundred forty-six million, six hundred fifty-three thousand, one hundred sixty".