21153000263320 has 32 divisors (see below), whose sum is σ = 48374484214320. Its totient is φ = 8322491905920.

The previous prime is 21153000263279. The next prime is 21153000263321. The reversal of 21153000263320 is 2336200035112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153000263321) 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, 4334628762 + ... + 4334633641.

Almost surely, 2^{21153000263320} is an apocalyptic number.

21153000263320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21153000263320 is an abundant number, since it is smaller than the sum of its proper divisors (27221483951000).

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

21153000263320 is a wasteful number, since it uses less digits than its factorization.

21153000263320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669262475 (or 8669262471 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 21153000263320 its reverse (2336200035112), we get a palindrome (23489200298432).

The spelling of 21153000263320 in words is "twenty-one trillion, one hundred fifty-three billion, two hundred sixty-three thousand, three hundred twenty".