21302426442 has 32 divisors (see below), whose sum is σ = 48498808320. Its totient is φ = 6174615920.

The previous prime is 21302426429. The next prime is 21302426443. The reversal of 21302426442 is 24462420312.

It is not an unprimeable number, because it can be changed into a prime (21302426443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7015092 + ... + 7018127.

It is an arithmetic number, because the mean of its divisors is an integer number (1515587760).

Almost surely, 2^21302426442 is an apocalyptic number.

21302426442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21302426442 is an abundant number, since it is smaller than the sum of its proper divisors (27196381878).

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

21302426442 is a wasteful number, since it uses less digits than its factorization.

21302426442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14033258.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21302426442 its reverse (24462420312), we get a palindrome (45764846754).

It can be divided in two parts, 21302 and 426442, that added together give a palindrome (447744).

The spelling of 21302426442 in words is "twenty-one billion, three hundred two million, four hundred twenty-six thousand, four hundred forty-two".