21533150430 has 64 divisors (see below), whose sum is σ = 62641900800. Its totient is φ = 5220156960.

The previous prime is 21533150423. The next prime is 21533150437. The reversal of 21533150430 is 3405133512.

21533150430 is a `hidden beast` number, since 2 + 153 + 3 + 1 + 504 + 3 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21533150423) and next prime (21533150437).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21533150394 and 21533150403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21533150437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3622140 + ... + 3628079.

It is an arithmetic number, because the mean of its divisors is an integer number (978779700).

Almost surely, 2^21533150430 is an apocalyptic number.

21533150430 is an abundant number, since it is smaller than the sum of its proper divisors (41108750370).

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

21533150430 is a wasteful number, since it uses less digits than its factorization.

21533150430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7250246 (or 7250240 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 21533150430 its reverse (3405133512), we get a palindrome (24938283942).

The spelling of 21533150430 in words is "twenty-one billion, five hundred thirty-three million, one hundred fifty thousand, four hundred thirty".