21150205423610 has 8 divisors (see below), whose sum is σ = 38070369762516. Its totient is φ = 8460082169440.

The previous prime is 21150205423609. The next prime is 21150205423769. The reversal of 21150205423610 is 1632450205112.

It can be written as a sum of positive squares in 2 ways, for example, as 19715296116481 + 1434909307129 = 4440191^2 + 1197877^2 .

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

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, 1057510271171 + ... + 1057510271190.

Almost surely, 2^{21150205423610} is an apocalyptic number.

21150205423610 is a deficient number, since it is larger than the sum of its proper divisors (16920164338906).

21150205423610 is a wasteful number, since it uses less digits than its factorization.

21150205423610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115020542368.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 21150205423610 its reverse (1632450205112), we get a palindrome (22782655628722).

The spelling of 21150205423610 in words is "twenty-one trillion, one hundred fifty billion, two hundred five million, four hundred twenty-three thousand, six hundred ten".