21342002242 has 32 divisors (see below), whose sum is σ = 35375823360. Its totient is φ = 9575575680.

The previous prime is 21342002221. The next prime is 21342002261. The reversal of 21342002242 is 24220024312.

It is a super-3 number, since 3×21342002242³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179528 + ... + 1197484.

It is an arithmetic number, because the mean of its divisors is an integer number (1105494480).

Almost surely, 2^21342002242 is an apocalyptic number.

21342002242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21342002242 is a deficient number, since it is larger than the sum of its proper divisors (14033821118).

21342002242 is a wasteful number, since it uses less digits than its factorization.

21342002242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18666.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21342002242 its reverse (24220024312), we get a palindrome (45562026554).

The spelling of 21342002242 in words is "twenty-one billion, three hundred forty-two million, two thousand, two hundred forty-two".