21054624362 has 4 divisors (see below), whose sum is σ = 31581936546. Its totient is φ = 10527312180.

The previous prime is 21054624257. The next prime is 21054624377. The reversal of 21054624362 is 26342645012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17769156601 + 3285467761 = 133301^2 + 57319^2 .

It is a super-3 number, since 3×21054624362³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5263656089 + ... + 5263656092.

Almost surely, 2^21054624362 is an apocalyptic number.

21054624362 is a deficient number, since it is larger than the sum of its proper divisors (10527312184).

21054624362 is a wasteful number, since it uses less digits than its factorization.

21054624362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10527312183.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 21054624362 in words is "twenty-one billion, fifty-four million, six hundred twenty-four thousand, three hundred sixty-two".