21342020010 has 32 divisors (see below), whose sum is σ = 51245263872. Its totient is φ = 5688492480.

The previous prime is 21342019939. The next prime is 21342020023. The reversal of 21342020010 is 1002024312.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 105169 + ... + 231828.

It is an arithmetic number, because the mean of its divisors is an integer number (1601414496).

Almost surely, 2^21342020010 is an apocalyptic number.

21342020010 is an abundant number, since it is smaller than the sum of its proper divisors (29903243862).

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

21342020010 is a wasteful number, since it uses less digits than its factorization.

21342020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339118.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21342020010 its reverse (1002024312), we get a palindrome (22344044322).

The spelling of 21342020010 in words is "twenty-one billion, three hundred forty-two million, twenty thousand, ten".