21342682810 has 32 divisors (see below), whose sum is σ = 40693534272. Its totient is φ = 8031555840.

The previous prime is 21342682807. The next prime is 21342682817. The reversal of 21342682810 is 1828624312.

It is a happy number.

It is a super-2 number, since 2×21342682810² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21342682810.

It is not an unprimeable number, because it can be changed into a prime (21342682817) 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, 405469 + ... + 455071.

It is an arithmetic number, because the mean of its divisors is an integer number (1271672946).

Almost surely, 2^21342682810 is an apocalyptic number.

21342682810 is a deficient number, since it is larger than the sum of its proper divisors (19350851462).

21342682810 is a wasteful number, since it uses less digits than its factorization.

21342682810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52158.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 21342682810 in words is "twenty-one billion, three hundred forty-two million, six hundred eighty-two thousand, eight hundred ten".