21310313034 has 64 divisors (see below), whose sum is σ = 44761206528. Its totient is φ = 6758169600.

The previous prime is 21310313023. The next prime is 21310313039. The reversal of 21310313034 is 43031301312.

It is a self number, because there is not a number n which added to its sum of digits gives 21310313034.

It is not an unprimeable number, because it can be changed into a prime (21310313039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1369522 + ... + 1384994.

It is an arithmetic number, because the mean of its divisors is an integer number (699393852).

Almost surely, 2^21310313034 is an apocalyptic number.

21310313034 is an abundant number, since it is smaller than the sum of its proper divisors (23450893494).

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

21310313034 is a wasteful number, since it uses less digits than its factorization.

21310313034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15663.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21310313034 its reverse (43031301312), we get a palindrome (64341614346).

The spelling of 21310313034 in words is "twenty-one billion, three hundred ten million, three hundred thirteen thousand, thirty-four".