21420460026 has 48 divisors (see below), whose sum is σ = 53096067648. Its totient is φ = 6113793600.

The previous prime is 21420460021. The next prime is 21420460049. The reversal of 21420460026 is 62006402412.

21420460026 is a `hidden beast` number, since 2 + 14 + 20 + 4 + 600 + 26 = 666.

It is a super-2 number, since 2×21420460026² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21420460021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34806 + ... + 209886.

It is an arithmetic number, because the mean of its divisors is an integer number (1106168076).

Almost surely, 2^21420460026 is an apocalyptic number.

21420460026 is an abundant number, since it is smaller than the sum of its proper divisors (31675607622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21420460026 is a wasteful number, since it uses less digits than its factorization.

21420460026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176067 (or 176064 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21420460026 its reverse (62006402412), we get a palindrome (83426862438).

The spelling of 21420460026 in words is "twenty-one billion, four hundred twenty million, four hundred sixty thousand, twenty-six".