21423400010 has 8 divisors (see below), whose sum is σ = 38562120036. Its totient is φ = 8569360000.

The previous prime is 21423399997. The next prime is 21423400067. The reversal of 21423400010 is 1000432412.

It can be written as a sum of positive squares in 2 ways, for example, as 21415688281 + 7711729 = 146341^2 + 2777^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1071169991 + ... + 1071170010.

Almost surely, 2^21423400010 is an apocalyptic number.

21423400010 is a deficient number, since it is larger than the sum of its proper divisors (17138720026).

21423400010 is a wasteful number, since it uses less digits than its factorization.

21423400010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142340008.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21423400010 its reverse (1000432412), we get a palindrome (22423832422).

The spelling of 21423400010 in words is "twenty-one billion, four hundred twenty-three million, four hundred thousand, ten".