21100152330 has 48 divisors (see below), whose sum is σ = 54961928424. Its totient is φ = 5616293760.

The previous prime is 21100152257. The next prime is 21100152341. The reversal of 21100152330 is 3325100112.

21100152330 is a `hidden beast` number, since 2 + 110 + 0 + 1 + 523 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14653828809 + 6446323521 = 121053^2 + 80289^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167989 + ... + 265368.

Almost surely, 2^21100152330 is an apocalyptic number.

21100152330 is an abundant number, since it is smaller than the sum of its proper divisors (33861776094).

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

21100152330 is a wasteful number, since it uses less digits than its factorization.

21100152330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433911 (or 433908 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 21100152330 its reverse (3325100112), we get a palindrome (24425252442).

The spelling of 21100152330 in words is "twenty-one billion, one hundred million, one hundred fifty-two thousand, three hundred thirty".