21513060402 has 16 divisors (see below), whose sum is σ = 43050219552. Its totient is φ = 7167003680.

The previous prime is 21513060391. The next prime is 21513060473. The reversal of 21513060402 is 20406031512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992499 + ... + 1013942.

It is an arithmetic number, because the mean of its divisors is an integer number (2690638722).

Almost surely, 2^21513060402 is an apocalyptic number.

21513060402 is an abundant number, since it is smaller than the sum of its proper divisors (21537159150).

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

21513060402 is a wasteful number, since it uses less digits than its factorization.

21513060402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008233.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21513060402 its reverse (20406031512), we get a palindrome (41919091914).

The spelling of 21513060402 in words is "twenty-one billion, five hundred thirteen million, sixty thousand, four hundred two".