21049131152 has 80 divisors (see below), whose sum is σ = 49093107840. Its totient is φ = 8540826624.

The previous prime is 21049131137. The next prime is 21049131167. The reversal of 21049131152 is 25113194012.

It is an interprime number because it is at equal distance from previous prime (21049131137) and next prime (21049131167).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6461108 + ... + 6464364.

It is an arithmetic number, because the mean of its divisors is an integer number (613663848).

Almost surely, 2^21049131152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21049131152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24546553920).

21049131152 is an abundant number, since it is smaller than the sum of its proper divisors (28043976688).

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

21049131152 is a wasteful number, since it uses less digits than its factorization.

21049131152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6328 (or 6322 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 21049131152 in words is "twenty-one billion, forty-nine million, one hundred thirty-one thousand, one hundred fifty-two".