21005012062 has 8 divisors (see below), whose sum is σ = 32877410256. Its totient is φ = 10045875312.

The previous prime is 21005012051. The next prime is 21005012071. The reversal of 21005012062 is 26021050012.

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

It is a congruent 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, 228315303 + ... + 228315394.

It is an arithmetic number, because the mean of its divisors is an integer number (4109676282).

Almost surely, 2^21005012062 is an apocalyptic number.

21005012062 is a deficient number, since it is larger than the sum of its proper divisors (11872398194).

21005012062 is a wasteful number, since it uses less digits than its factorization.

21005012062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456630722.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21005012062 its reverse (26021050012), we get a palindrome (47026062074).

The spelling of 21005012062 in words is "twenty-one billion, five million, twelve thousand, sixty-two".