21201484730 has 8 divisors (see below), whose sum is σ = 38162672532. Its totient is φ = 8480593888.

The previous prime is 21201484729. The next prime is 21201484751. The reversal of 21201484730 is 3748410212.

It can be written as a sum of positive squares in 2 ways, for example, as 20181895969 + 1019588761 = 142063^2 + 31931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060074227 + ... + 1060074246.

Almost surely, 2^21201484730 is an apocalyptic number.

21201484730 is a deficient number, since it is larger than the sum of its proper divisors (16961187802).

21201484730 is a wasteful number, since it uses less digits than its factorization.

21201484730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120148480.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 21201484730 its reverse (3748410212), we get a palindrome (24949894942).

The spelling of 21201484730 in words is "twenty-one billion, two hundred one million, four hundred eighty-four thousand, seven hundred thirty".