21136016330 has 64 divisors (see below), whose sum is σ = 44757812736. Its totient is φ = 7084800000.

The previous prime is 21136016329. The next prime is 21136016353. The reversal of 21136016330 is 3361063112.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 21136016330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1064090 + ... + 1083770.

It is an arithmetic number, because the mean of its divisors is an integer number (699340824).

Almost surely, 2^21136016330 is an apocalyptic number.

21136016330 is an abundant number, since it is smaller than the sum of its proper divisors (23621796406).

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

21136016330 is a wasteful number, since it uses less digits than its factorization.

21136016330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20463.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21136016330 its reverse (3361063112), we get a palindrome (24497079442).

The spelling of 21136016330 in words is "twenty-one billion, one hundred thirty-six million, sixteen thousand, three hundred thirty".