21154555302 has 128 divisors (see below), whose sum is σ = 47514470400. Its totient is φ = 6244761600.

The previous prime is 21154555291. The next prime is 21154555349. The reversal of 21154555302 is 20355545112.

It is a super-2 number, since 2×21154555302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 52754302 + ... + 52754702.

It is an arithmetic number, because the mean of its divisors is an integer number (371206800).

Almost surely, 2^21154555302 is an apocalyptic number.

21154555302 is an abundant number, since it is smaller than the sum of its proper divisors (26359915098).

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

21154555302 is a wasteful number, since it uses less digits than its factorization.

21154555302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758.

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 21154555302 in words is "twenty-one billion, one hundred fifty-four million, five hundred fifty-five thousand, three hundred two".