21426135730330 has 64 divisors (see below), whose sum is σ = 40321435564800. Its totient is φ = 8182030912000.

The previous prime is 21426135730247. The next prime is 21426135730331. The reversal of 21426135730330 is 3303753162412.

It is not an unprimeable number, because it can be changed into a prime (21426135730331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1112516241 + ... + 1112535499.

It is an arithmetic number, because the mean of its divisors is an integer number (630022430700).

Almost surely, 2^{21426135730330} is an apocalyptic number.

21426135730330 is a deficient number, since it is larger than the sum of its proper divisors (18895299834470).

21426135730330 is a wasteful number, since it uses less digits than its factorization.

21426135730330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28359.

The product of its (nonzero) digits is 272160, while the sum is 40.

Adding to 21426135730330 its reverse (3303753162412), we get a palindrome (24729888892742).

The spelling of 21426135730330 in words is "twenty-one trillion, four hundred twenty-six billion, one hundred thirty-five million, seven hundred thirty thousand, three hundred thirty".