21143034300252 has 24 divisors (see below), whose sum is σ = 49342164156432. Its totient is φ = 7046475606400.

The previous prime is 21143034300239. The next prime is 21143034300253. The reversal of 21143034300252 is 25200343034112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143034300253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150238449 + ... + 150379112.

It is an arithmetic number, because the mean of its divisors is an integer number (2055923506518).

Almost surely, 2^{21143034300252} is an apocalyptic number.

It is an amenable number.

21143034300252 is an abundant number, since it is smaller than the sum of its proper divisors (28199129856180).

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

21143034300252 is a wasteful number, since it uses less digits than its factorization.

21143034300252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300623429 (or 300623427 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21143034300252 its reverse (25200343034112), we get a palindrome (46343377334364).

The spelling of 21143034300252 in words is "twenty-one trillion, one hundred forty-three billion, thirty-four million, three hundred thousand, two hundred fifty-two".