21420034202 has 8 divisors (see below), whose sum is σ = 36720058656. Its totient is φ = 9180014652.

The previous prime is 21420034177. The next prime is 21420034243. The reversal of 21420034202 is 20243002412.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765001208 + ... + 765001235.

It is an arithmetic number, because the mean of its divisors is an integer number (4590007332).

Almost surely, 2^21420034202 is an apocalyptic number.

21420034202 is a deficient number, since it is larger than the sum of its proper divisors (15300024454).

21420034202 is a wasteful number, since it uses less digits than its factorization.

21420034202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530002452.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21420034202 its reverse (20243002412), we get a palindrome (41663036614).

The spelling of 21420034202 in words is "twenty-one billion, four hundred twenty million, thirty-four thousand, two hundred two".