21150541300 has 108 divisors (see below), whose sum is σ = 53919884844. Its totient is φ = 7179648000.

The previous prime is 21150541297. The next prime is 21150541303. The reversal of 21150541300 is 314505112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21150541297) and next prime (21150541303).

It can be written as a sum of positive squares in 6 ways, for example, as 1499548176 + 19650993124 = 38724^2 + 140182^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150541303) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 473532 + ... + 516268.

It is an arithmetic number, because the mean of its divisors is an integer number (499258193).

Almost surely, 2^21150541300 is an apocalyptic number.

21150541300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21150541300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26959942422).

21150541300 is an abundant number, since it is smaller than the sum of its proper divisors (32769343544).

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

21150541300 is a wasteful number, since it uses less digits than its factorization.

21150541300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42866 (or 42852 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 21150541300 in words is "twenty-one billion, one hundred fifty million, five hundred forty-one thousand, three hundred".